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Finding the Fourth Proportional to 478,203.90, 717,488.09 and 178,818.18

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Solution

The fourth proportional to 478,203.90, 717,488.09 and 178,818.18 is: 268,295.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,203.90 : 717,488.09 = 178,818.18 : x
  2. Step 2: Convert to fraction form
    478,203.90/717,488.09 = 178,818.18/x
  3. Step 3: Cross multiply
    478,203.90x = 717,488.09 × 178,818.18
  4. Step 4: Simplify right side
    478,203.90x = 128,299,914,425.48
  5. Step 5: Solve for x
    x = 128,299,914,425.48/478,203.90
  6. Step 6: Final answer
    x = 268,295.42

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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.