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Finding the Fourth Proportional to 718,047.23, 990,900.27 and 395,757.54

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Solution

The fourth proportional to 718,047.23, 990,900.27 and 395,757.54 is: 546,142.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,047.23 : 990,900.27 = 395,757.54 : x
  2. Step 2: Convert to fraction form
    718,047.23/990,900.27 = 395,757.54/x
  3. Step 3: Cross multiply
    718,047.23x = 990,900.27 × 395,757.54
  4. Step 4: Simplify right side
    718,047.23x = 392,156,253,240.54
  5. Step 5: Solve for x
    x = 392,156,253,240.54/718,047.23
  6. Step 6: Final answer
    x = 546,142.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.