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Finding the Fourth Proportional to 478,512.70, 717,423.45 and 268,215.10

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Solution

The fourth proportional to 478,512.70, 717,423.45 and 268,215.10 is: 402,128.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,512.70 : 717,423.45 = 268,215.10 : x
  2. Step 2: Convert to fraction form
    478,512.70/717,423.45 = 268,215.10/x
  3. Step 3: Cross multiply
    478,512.70x = 717,423.45 × 268,215.10
  4. Step 4: Simplify right side
    478,512.70x = 192,423,802,384.10
  5. Step 5: Solve for x
    x = 192,423,802,384.10/478,512.70
  6. Step 6: Final answer
    x = 402,128.93

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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.