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Finding the Fourth Proportional to 478,411.10, 717,616.65 and 319,780.70

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Solution

The fourth proportional to 478,411.10, 717,616.65 and 319,780.70 is: 479,671.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,411.10 : 717,616.65 = 319,780.70 : x
  2. Step 2: Convert to fraction form
    478,411.10/717,616.65 = 319,780.70/x
  3. Step 3: Cross multiply
    478,411.10x = 717,616.65 × 319,780.70
  4. Step 4: Simplify right side
    478,411.10x = 229,479,954,668.66
  5. Step 5: Solve for x
    x = 229,479,954,668.66/478,411.10
  6. Step 6: Final answer
    x = 479,671.05

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Similar ratio
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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.