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Finding the Fourth Proportional to 871,407.43, 1,202,655.02 and 489,434.20

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Solution

The fourth proportional to 871,407.43, 1,202,655.02 and 489,434.20 is: 675,482.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,407.43 : 1,202,655.02 = 489,434.20 : x
  2. Step 2: Convert to fraction form
    871,407.43/1,202,655.02 = 489,434.20/x
  3. Step 3: Cross multiply
    871,407.43x = 1,202,655.02 × 489,434.20
  4. Step 4: Simplify right side
    871,407.43x = 588,620,497,589.68
  5. Step 5: Solve for x
    x = 588,620,497,589.68/871,407.43
  6. Step 6: Final answer
    x = 675,482.53

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Double scale
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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.