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Finding the Fourth Proportional to 712,402.80, 982,721.88 and 486,380.40

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Solution

The fourth proportional to 712,402.80, 982,721.88 and 486,380.40 is: 670,935.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,402.80 : 982,721.88 = 486,380.40 : x
  2. Step 2: Convert to fraction form
    712,402.80/982,721.88 = 486,380.40/x
  3. Step 3: Cross multiply
    712,402.80x = 982,721.88 × 486,380.40
  4. Step 4: Simplify right side
    712,402.80x = 477,976,661,083.15
  5. Step 5: Solve for x
    x = 477,976,661,083.15/712,402.80
  6. Step 6: Final answer
    x = 670,935.97

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1.5x scale

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.