Home / 428,574.06-642,737.16-144,233.28

Finding the Fourth Proportional to 428,574.06, 642,737.16 and 144,233.28

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Solution

The fourth proportional to 428,574.06, 642,737.16 and 144,233.28 is: 216,308.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,574.06 : 642,737.16 = 144,233.28 : x
  2. Step 2: Convert to fraction form
    428,574.06/642,737.16 = 144,233.28/x
  3. Step 3: Cross multiply
    428,574.06x = 642,737.16 × 144,233.28
  4. Step 4: Simplify right side
    428,574.06x = 92,704,088,764.68
  5. Step 5: Solve for x
    x = 92,704,088,764.68/428,574.06
  6. Step 6: Final answer
    x = 216,308.21

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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.