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Finding the Fourth Proportional to 871,290.60, 1,306,244.70 and 477,306.60

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Solution

The fourth proportional to 871,290.60, 1,306,244.70 and 477,306.60 is: 715,581.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,290.60 : 1,306,244.70 = 477,306.60 : x
  2. Step 2: Convert to fraction form
    871,290.60/1,306,244.70 = 477,306.60/x
  3. Step 3: Cross multiply
    871,290.60x = 1,306,244.70 × 477,306.60
  4. Step 4: Simplify right side
    871,290.60x = 623,479,216,525.02
  5. Step 5: Solve for x
    x = 623,479,216,525.02/871,290.60
  6. Step 6: Final answer
    x = 715,581.25

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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.