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Finding the Fourth Proportional to 718,158.30, 991,018.71 and 395,867.94

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Solution

The fourth proportional to 718,158.30, 991,018.71 and 395,867.94 is: 546,275.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,158.30 : 991,018.71 = 395,867.94 : x
  2. Step 2: Convert to fraction form
    718,158.30/991,018.71 = 395,867.94/x
  3. Step 3: Cross multiply
    718,158.30x = 991,018.71 × 395,867.94
  4. Step 4: Simplify right side
    718,158.30x = 392,312,535,229.16
  5. Step 5: Solve for x
    x = 392,312,535,229.16/718,158.30
  6. Step 6: Final answer
    x = 546,275.85

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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.