Home / 461,318.40-691,912.80-145,807.20

Finding the Fourth Proportional to 461,318.40, 691,912.80 and 145,807.20

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Solution

The fourth proportional to 461,318.40, 691,912.80 and 145,807.20 is: 218,690.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,318.40 : 691,912.80 = 145,807.20 : x
  2. Step 2: Convert to fraction form
    461,318.40/691,912.80 = 145,807.20/x
  3. Step 3: Cross multiply
    461,318.40x = 691,912.80 × 145,807.20
  4. Step 4: Simplify right side
    461,318.40x = 100,885,868,012.16
  5. Step 5: Solve for x
    x = 100,885,868,012.16/461,318.40
  6. Step 6: Final answer
    x = 218,690.32

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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.