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Finding the Fourth Proportional to 662,051.92, 913,472.40 and 390,130.96

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Solution

The fourth proportional to 662,051.92, 913,472.40 and 390,130.96 is: 538,286.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,051.92 : 913,472.40 = 390,130.96 : x
  2. Step 2: Convert to fraction form
    662,051.92/913,472.40 = 390,130.96/x
  3. Step 3: Cross multiply
    662,051.92x = 913,472.40 × 390,130.96
  4. Step 4: Simplify right side
    662,051.92x = 356,373,864,345.50
  5. Step 5: Solve for x
    x = 356,373,864,345.50/662,051.92
  6. Step 6: Final answer
    x = 538,286.88

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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.