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Finding the Fourth Proportional to 718,752.60, 991,885.50 and 396,476.28

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Solution

The fourth proportional to 718,752.60, 991,885.50 and 396,476.28 is: 547,141.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,752.60 : 991,885.50 = 396,476.28 : x
  2. Step 2: Convert to fraction form
    718,752.60/991,885.50 = 396,476.28/x
  3. Step 3: Cross multiply
    718,752.60x = 991,885.50 × 396,476.28
  4. Step 4: Simplify right side
    718,752.60x = 393,259,073,225.94
  5. Step 5: Solve for x
    x = 393,259,073,225.94/718,752.60
  6. Step 6: Final answer
    x = 547,141.08

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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.