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Finding the Fourth Proportional to 636,307.68, 878,105.16 and 349,832.64

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Solution

The fourth proportional to 636,307.68, 878,105.16 and 349,832.64 is: 482,769.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,307.68 : 878,105.16 = 349,832.64 : x
  2. Step 2: Convert to fraction form
    636,307.68/878,105.16 = 349,832.64/x
  3. Step 3: Cross multiply
    636,307.68x = 878,105.16 × 349,832.64
  4. Step 4: Simplify right side
    636,307.68x = 307,189,846,320.42
  5. Step 5: Solve for x
    x = 307,189,846,320.42/636,307.68
  6. Step 6: Final answer
    x = 482,769.35

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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.