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Finding the Fourth Proportional to 696,713.12, 961,459.60 and 378,761.12

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Solution

The fourth proportional to 696,713.12, 961,459.60 and 378,761.12 is: 522,687.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,713.12 : 961,459.60 = 378,761.12 : x
  2. Step 2: Convert to fraction form
    696,713.12/961,459.60 = 378,761.12/x
  3. Step 3: Cross multiply
    696,713.12x = 961,459.60 × 378,761.12
  4. Step 4: Simplify right side
    696,713.12x = 364,163,514,930.75
  5. Step 5: Solve for x
    x = 364,163,514,930.75/696,713.12
  6. Step 6: Final answer
    x = 522,687.90

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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.