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Finding the Fourth Proportional to 385,319.78, 577,836.28 and 132,529.30

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Solution

The fourth proportional to 385,319.78, 577,836.28 and 132,529.30 is: 198,744.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,319.78 : 577,836.28 = 132,529.30 : x
  2. Step 2: Convert to fraction form
    385,319.78/577,836.28 = 132,529.30/x
  3. Step 3: Cross multiply
    385,319.78x = 577,836.28 × 132,529.30
  4. Step 4: Simplify right side
    385,319.78x = 76,580,237,703.00
  5. Step 5: Solve for x
    x = 76,580,237,703.00/385,319.78
  6. Step 6: Final answer
    x = 198,744.63

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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.