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Finding the Fourth Proportional to 986,641.76, 1,479,363.34 and 386,884.40

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Solution

The fourth proportional to 986,641.76, 1,479,363.34 and 386,884.40 is: 580,091.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,641.76 : 1,479,363.34 = 386,884.40 : x
  2. Step 2: Convert to fraction form
    986,641.76/1,479,363.34 = 386,884.40/x
  3. Step 3: Cross multiply
    986,641.76x = 1,479,363.34 × 386,884.40
  4. Step 4: Simplify right side
    986,641.76x = 572,342,598,177.90
  5. Step 5: Solve for x
    x = 572,342,598,177.90/986,641.76
  6. Step 6: Final answer
    x = 580,091.60

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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.