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Finding the Fourth Proportional to 871,404.93, 1,202,651.57 and 489,431.70

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Solution

The fourth proportional to 871,404.93, 1,202,651.57 and 489,431.70 is: 675,479.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,404.93 : 1,202,651.57 = 489,431.70 : x
  2. Step 2: Convert to fraction form
    871,404.93/1,202,651.57 = 489,431.70/x
  3. Step 3: Cross multiply
    871,404.93x = 1,202,651.57 × 489,431.70
  4. Step 4: Simplify right side
    871,404.93x = 588,615,799,965.61
  5. Step 5: Solve for x
    x = 588,615,799,965.61/871,404.93
  6. Step 6: Final answer
    x = 675,479.08

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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.