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Finding the Fourth Proportional to 492,087.40, 738,131.10 and 487,940.20

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Solution

The fourth proportional to 492,087.40, 738,131.10 and 487,940.20 is: 731,910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,087.40 : 738,131.10 = 487,940.20 : x
  2. Step 2: Convert to fraction form
    492,087.40/738,131.10 = 487,940.20/x
  3. Step 3: Cross multiply
    492,087.40x = 738,131.10 × 487,940.20
  4. Step 4: Simplify right side
    492,087.40x = 360,163,836,560.22
  5. Step 5: Solve for x
    x = 360,163,836,560.22/492,087.40
  6. Step 6: Final answer
    x = 731,910.30

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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.