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Finding the Fourth Proportional to 385,449.60, 578,030.56 and 132,659.36

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Solution

The fourth proportional to 385,449.60, 578,030.56 and 132,659.36 is: 198,939.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,449.60 : 578,030.56 = 132,659.36 : x
  2. Step 2: Convert to fraction form
    385,449.60/578,030.56 = 132,659.36/x
  3. Step 3: Cross multiply
    385,449.60x = 578,030.56 × 132,659.36
  4. Step 4: Simplify right side
    385,449.60x = 76,681,164,150.04
  5. Step 5: Solve for x
    x = 76,681,164,150.04/385,449.60
  6. Step 6: Final answer
    x = 198,939.53

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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.