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Finding the Fourth Proportional to 712,230.67, 982,877.85 and 389,940.68

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Solution

The fourth proportional to 712,230.67, 982,877.85 and 389,940.68 is: 538,117.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,230.67 : 982,877.85 = 389,940.68 : x
  2. Step 2: Convert to fraction form
    712,230.67/982,877.85 = 389,940.68/x
  3. Step 3: Cross multiply
    712,230.67x = 982,877.85 × 389,940.68
  4. Step 4: Simplify right side
    712,230.67x = 383,264,055,957.34
  5. Step 5: Solve for x
    x = 383,264,055,957.34/712,230.67
  6. Step 6: Final answer
    x = 538,117.88

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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.