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Finding the Fourth Proportional to 478,230.44, 717,342.78 and 145,806.44

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Solution

The fourth proportional to 478,230.44, 717,342.78 and 145,806.44 is: 218,708.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,230.44 : 717,342.78 = 145,806.44 : x
  2. Step 2: Convert to fraction form
    478,230.44/717,342.78 = 145,806.44/x
  3. Step 3: Cross multiply
    478,230.44x = 717,342.78 × 145,806.44
  4. Step 4: Simplify right side
    478,230.44x = 104,593,197,011.50
  5. Step 5: Solve for x
    x = 104,593,197,011.50/478,230.44
  6. Step 6: Final answer
    x = 218,708.78

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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.