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Finding the Fourth Proportional to 658,810.50, 988,215.75 and 209,532.30

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Solution

The fourth proportional to 658,810.50, 988,215.75 and 209,532.30 is: 314,298.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,810.50 : 988,215.75 = 209,532.30 : x
  2. Step 2: Convert to fraction form
    658,810.50/988,215.75 = 209,532.30/x
  3. Step 3: Cross multiply
    658,810.50x = 988,215.75 × 209,532.30
  4. Step 4: Simplify right side
    658,810.50x = 207,063,118,993.73
  5. Step 5: Solve for x
    x = 207,063,118,993.73/658,810.50
  6. Step 6: Final answer
    x = 314,298.45

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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.