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Finding the Fourth Proportional to 478,475.80, 717,689.83 and 178,934.35

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Solution

The fourth proportional to 478,475.80, 717,689.83 and 178,934.35 is: 268,392.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,475.80 : 717,689.83 = 178,934.35 : x
  2. Step 2: Convert to fraction form
    478,475.80/717,689.83 = 178,934.35/x
  3. Step 3: Cross multiply
    478,475.80x = 717,689.83 × 178,934.35
  4. Step 4: Simplify right side
    478,475.80x = 128,419,363,232.66
  5. Step 5: Solve for x
    x = 128,419,363,232.66/478,475.80
  6. Step 6: Final answer
    x = 268,392.60

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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.