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Finding the Fourth Proportional to 658,220.70, 987,331.05 and 618,854.70

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Solution

The fourth proportional to 658,220.70, 987,331.05 and 618,854.70 is: 928,282.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,220.70 : 987,331.05 = 618,854.70 : x
  2. Step 2: Convert to fraction form
    658,220.70/987,331.05 = 618,854.70/x
  3. Step 3: Cross multiply
    658,220.70x = 987,331.05 × 618,854.70
  4. Step 4: Simplify right side
    658,220.70x = 611,014,460,748.44
  5. Step 5: Solve for x
    x = 611,014,460,748.44/658,220.70
  6. Step 6: Final answer
    x = 928,282.05

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Similar ratio
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1.5x scale

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.