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Finding the Fourth Proportional to 478,640.70, 717,615.45 and 268,343.10

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Solution

The fourth proportional to 478,640.70, 717,615.45 and 268,343.10 is: 402,320.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,640.70 : 717,615.45 = 268,343.10 : x
  2. Step 2: Convert to fraction form
    478,640.70/717,615.45 = 268,343.10/x
  3. Step 3: Cross multiply
    478,640.70x = 717,615.45 × 268,343.10
  4. Step 4: Simplify right side
    478,640.70x = 192,567,154,460.90
  5. Step 5: Solve for x
    x = 192,567,154,460.90/478,640.70
  6. Step 6: Final answer
    x = 402,320.89

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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.