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Finding the Fourth Proportional to 369,519.90, 553,910.79 and 318,713.15

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Solution

The fourth proportional to 369,519.90, 553,910.79 and 318,713.15 is: 477,751.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,519.90 : 553,910.79 = 318,713.15 : x
  2. Step 2: Convert to fraction form
    369,519.90/553,910.79 = 318,713.15/x
  3. Step 3: Cross multiply
    369,519.90x = 553,910.79 × 318,713.15
  4. Step 4: Simplify right side
    369,519.90x = 176,538,653,487.08
  5. Step 5: Solve for x
    x = 176,538,653,487.08/369,519.90
  6. Step 6: Final answer
    x = 477,751.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.