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Finding the Fourth Proportional to 662,398.40, 913,191.42 and 447,197.60

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Solution

The fourth proportional to 662,398.40, 913,191.42 and 447,197.60 is: 616,512.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,398.40 : 913,191.42 = 447,197.60 : x
  2. Step 2: Convert to fraction form
    662,398.40/913,191.42 = 447,197.60/x
  3. Step 3: Cross multiply
    662,398.40x = 913,191.42 × 447,197.60
  4. Step 4: Simplify right side
    662,398.40x = 408,377,011,364.59
  5. Step 5: Solve for x
    x = 408,377,011,364.59/662,398.40
  6. Step 6: Final answer
    x = 616,512.68

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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.