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Finding the Fourth Proportional to 209,969,272.70, 314,953,909.05 and 189,561,938.30

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Solution

The fourth proportional to 209,969,272.70, 314,953,909.05 and 189,561,938.30 is: 284,342,907.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,969,272.70 : 314,953,909.05 = 189,561,938.30 : x
  2. Step 2: Convert to fraction form
    209,969,272.70/314,953,909.05 = 189,561,938.30/x
  3. Step 3: Cross multiply
    209,969,272.70x = 314,953,909.05 × 189,561,938.30
  4. Step 4: Simplify right side
    209,969,272.70x = 59,703,273,474,679,920
  5. Step 5: Solve for x
    x = 59,703,273,474,679,920/209,969,272.70
  6. Step 6: Final answer
    x = 284,342,907.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.