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Finding the Fourth Proportional to 871,807.80, 1,307,711.70 and 659,231.40

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Solution

The fourth proportional to 871,807.80, 1,307,711.70 and 659,231.40 is: 988,847.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,807.80 : 1,307,711.70 = 659,231.40 : x
  2. Step 2: Convert to fraction form
    871,807.80/1,307,711.70 = 659,231.40/x
  3. Step 3: Cross multiply
    871,807.80x = 1,307,711.70 × 659,231.40
  4. Step 4: Simplify right side
    871,807.80x = 862,084,614,787.38
  5. Step 5: Solve for x
    x = 862,084,614,787.38/871,807.80
  6. Step 6: Final answer
    x = 988,847.10

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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.