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Finding the Fourth Proportional to 400,921.28, 601,451.40 and 134,707.76

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Solution

The fourth proportional to 400,921.28, 601,451.40 and 134,707.76 is: 202,084.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,921.28 : 601,451.40 = 134,707.76 : x
  2. Step 2: Convert to fraction form
    400,921.28/601,451.40 = 134,707.76/x
  3. Step 3: Cross multiply
    400,921.28x = 601,451.40 × 134,707.76
  4. Step 4: Simplify right side
    400,921.28x = 81,020,170,842.86
  5. Step 5: Solve for x
    x = 81,020,170,842.86/400,921.28
  6. Step 6: Final answer
    x = 202,084.98

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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.