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Finding the Fourth Proportional to 318,538.65, 477,474.78 and 118,772.13

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Solution

The fourth proportional to 318,538.65, 477,474.78 and 118,772.13 is: 178,033.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,538.65 : 477,474.78 = 118,772.13 : x
  2. Step 2: Convert to fraction form
    318,538.65/477,474.78 = 118,772.13/x
  3. Step 3: Cross multiply
    318,538.65x = 477,474.78 × 118,772.13
  4. Step 4: Simplify right side
    318,538.65x = 56,710,696,641.88
  5. Step 5: Solve for x
    x = 56,710,696,641.88/318,538.65
  6. Step 6: Final answer
    x = 178,033.96

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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.