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Finding the Fourth Proportional to 478,479.05, 717,694.70 and 178,937.61

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Solution

The fourth proportional to 478,479.05, 717,694.70 and 178,937.61 is: 268,397.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,479.05 : 717,694.70 = 178,937.61 : x
  2. Step 2: Convert to fraction form
    478,479.05/717,694.70 = 178,937.61/x
  3. Step 3: Cross multiply
    478,479.05x = 717,694.70 × 178,937.61
  4. Step 4: Simplify right side
    478,479.05x = 128,422,574,327.67
  5. Step 5: Solve for x
    x = 128,422,574,327.67/478,479.05
  6. Step 6: Final answer
    x = 268,397.49

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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.