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Finding the Fourth Proportional to 662,052.92, 913,473.78 and 390,131.96

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Solution

The fourth proportional to 662,052.92, 913,473.78 and 390,131.96 is: 538,288.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,052.92 : 913,473.78 = 390,131.96 : x
  2. Step 2: Convert to fraction form
    662,052.92/913,473.78 = 390,131.96/x
  3. Step 3: Cross multiply
    662,052.92x = 913,473.78 × 390,131.96
  4. Step 4: Simplify right side
    662,052.92x = 356,375,316,200.01
  5. Step 5: Solve for x
    x = 356,375,316,200.01/662,052.92
  6. Step 6: Final answer
    x = 538,288.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.