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Finding the Fourth Proportional to 871,806.80, 1,307,710.20 and 659,230.40

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Solution

The fourth proportional to 871,806.80, 1,307,710.20 and 659,230.40 is: 988,845.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,806.80 : 1,307,710.20 = 659,230.40 : x
  2. Step 2: Convert to fraction form
    871,806.80/1,307,710.20 = 659,230.40/x
  3. Step 3: Cross multiply
    871,806.80x = 1,307,710.20 × 659,230.40
  4. Step 4: Simplify right side
    871,806.80x = 862,082,318,230.08
  5. Step 5: Solve for x
    x = 862,082,318,230.08/871,806.80
  6. Step 6: Final answer
    x = 988,845.60

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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.