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Finding the Fourth Proportional to 612,177.20, 918,265.80 and 442,903.40

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Solution

The fourth proportional to 612,177.20, 918,265.80 and 442,903.40 is: 664,355.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,177.20 : 918,265.80 = 442,903.40 : x
  2. Step 2: Convert to fraction form
    612,177.20/918,265.80 = 442,903.40/x
  3. Step 3: Cross multiply
    612,177.20x = 918,265.80 × 442,903.40
  4. Step 4: Simplify right side
    612,177.20x = 406,703,044,923.72
  5. Step 5: Solve for x
    x = 406,703,044,923.72/612,177.20
  6. Step 6: Final answer
    x = 664,355.10

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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.