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Finding the Fourth Proportional to 487,907.40, 731,861.10 and 188,401.80

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Solution

The fourth proportional to 487,907.40, 731,861.10 and 188,401.80 is: 282,602.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,907.40 : 731,861.10 = 188,401.80 : x
  2. Step 2: Convert to fraction form
    487,907.40/731,861.10 = 188,401.80/x
  3. Step 3: Cross multiply
    487,907.40x = 731,861.10 × 188,401.80
  4. Step 4: Simplify right side
    487,907.40x = 137,883,948,589.98
  5. Step 5: Solve for x
    x = 137,883,948,589.98/487,907.40
  6. Step 6: Final answer
    x = 282,602.70

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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.