Home / 428,847.12-642,816.72-144,266.76

Finding the Fourth Proportional to 428,847.12, 642,816.72 and 144,266.76

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Solution

The fourth proportional to 428,847.12, 642,816.72 and 144,266.76 is: 216,247.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,847.12 : 642,816.72 = 144,266.76 : x
  2. Step 2: Convert to fraction form
    428,847.12/642,816.72 = 144,266.76/x
  3. Step 3: Cross multiply
    428,847.12x = 642,816.72 × 144,266.76
  4. Step 4: Simplify right side
    428,847.12x = 92,737,085,468.23
  5. Step 5: Solve for x
    x = 92,737,085,468.23/428,847.12
  6. Step 6: Final answer
    x = 216,247.43

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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.