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Finding the Fourth Proportional to 478,178.88, 717,267.20 and 145,754.88

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Solution

The fourth proportional to 478,178.88, 717,267.20 and 145,754.88 is: 218,631.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,178.88 : 717,267.20 = 145,754.88 : x
  2. Step 2: Convert to fraction form
    478,178.88/717,267.20 = 145,754.88/x
  3. Step 3: Cross multiply
    478,178.88x = 717,267.20 × 145,754.88
  4. Step 4: Simplify right side
    478,178.88x = 104,545,194,663.94
  5. Step 5: Solve for x
    x = 104,545,194,663.94/478,178.88
  6. Step 6: Final answer
    x = 218,631.98

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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.