Home / 428,520.52-642,824.55-148,001.32

Finding the Fourth Proportional to 428,520.52, 642,824.55 and 148,001.32

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Solution

The fourth proportional to 428,520.52, 642,824.55 and 148,001.32 is: 222,017.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,520.52 : 642,824.55 = 148,001.32 : x
  2. Step 2: Convert to fraction form
    428,520.52/642,824.55 = 148,001.32/x
  3. Step 3: Cross multiply
    428,520.52x = 642,824.55 × 148,001.32
  4. Step 4: Simplify right side
    428,520.52x = 95,138,881,928.41
  5. Step 5: Solve for x
    x = 95,138,881,928.41/428,520.52
  6. Step 6: Final answer
    x = 222,017.10

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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.