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Finding the Fourth Proportional to 712,197.72, 982,833.08 and 389,928.28

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Solution

The fourth proportional to 712,197.72, 982,833.08 and 389,928.28 is: 538,101.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,197.72 : 982,833.08 = 389,928.28 : x
  2. Step 2: Convert to fraction form
    712,197.72/982,833.08 = 389,928.28/x
  3. Step 3: Cross multiply
    712,197.72x = 982,833.08 × 389,928.28
  4. Step 4: Simplify right side
    712,197.72x = 383,234,412,411.50
  5. Step 5: Solve for x
    x = 383,234,412,411.50/712,197.72
  6. Step 6: Final answer
    x = 538,101.15

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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.