Home / 428,641.38-642,511.91-144,233.19

Finding the Fourth Proportional to 428,641.38, 642,511.91 and 144,233.19

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Solution

The fourth proportional to 428,641.38, 642,511.91 and 144,233.19 is: 216,198.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,641.38 : 642,511.91 = 144,233.19 : x
  2. Step 2: Convert to fraction form
    428,641.38/642,511.91 = 144,233.19/x
  3. Step 3: Cross multiply
    428,641.38x = 642,511.91 × 144,233.19
  4. Step 4: Simplify right side
    428,641.38x = 92,671,541,671.13
  5. Step 5: Solve for x
    x = 92,671,541,671.13/428,641.38
  6. Step 6: Final answer
    x = 216,198.31

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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.