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Finding the Fourth Proportional to 718,442.28, 991,516.92 and 412,558.80

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Solution

The fourth proportional to 718,442.28, 991,516.92 and 412,558.80 is: 569,369.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,442.28 : 991,516.92 = 412,558.80 : x
  2. Step 2: Convert to fraction form
    718,442.28/991,516.92 = 412,558.80/x
  3. Step 3: Cross multiply
    718,442.28x = 991,516.92 × 412,558.80
  4. Step 4: Simplify right side
    718,442.28x = 409,059,030,694.90
  5. Step 5: Solve for x
    x = 409,059,030,694.90/718,442.28
  6. Step 6: Final answer
    x = 569,369.37

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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.