Home / 672,616,935.12-928,234,272.98-390,337,520.88

Finding the Fourth Proportional to 672,616,935.12, 928,234,272.98 and 390,337,520.88

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Solution

The fourth proportional to 672,616,935.12, 928,234,272.98 and 390,337,520.88 is: 538,679,069.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,616,935.12 : 928,234,272.98 = 390,337,520.88 : x
  2. Step 2: Convert to fraction form
    672,616,935.12/928,234,272.98 = 390,337,520.88/x
  3. Step 3: Cross multiply
    672,616,935.12x = 928,234,272.98 × 390,337,520.88
  4. Step 4: Simplify right side
    672,616,935.12x = 362,324,664,910,862,400
  5. Step 5: Solve for x
    x = 362,324,664,910,862,400/672,616,935.12
  6. Step 6: Final answer
    x = 538,679,069.75

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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.