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Finding the Fourth Proportional to 636,057.72, 877,394.16 and 397,179

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Solution

The fourth proportional to 636,057.72, 877,394.16 and 397,179 is: 547,878.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,057.72 : 877,394.16 = 397,179 : x
  2. Step 2: Convert to fraction form
    636,057.72/877,394.16 = 397,179/x
  3. Step 3: Cross multiply
    636,057.72x = 877,394.16 × 397,179
  4. Step 4: Simplify right side
    636,057.72x = 348,482,535,074.64
  5. Step 5: Solve for x
    x = 348,482,535,074.64/636,057.72
  6. Step 6: Final answer
    x = 547,878.79

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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.