Home / 428,316.30-642,475.89-108,468

Finding the Fourth Proportional to 428,316.30, 642,475.89 and 108,468

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Solution

The fourth proportional to 428,316.30, 642,475.89 and 108,468 is: 162,702.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,316.30 : 642,475.89 = 108,468 : x
  2. Step 2: Convert to fraction form
    428,316.30/642,475.89 = 108,468/x
  3. Step 3: Cross multiply
    428,316.30x = 642,475.89 × 108,468
  4. Step 4: Simplify right side
    428,316.30x = 69,688,074,836.52
  5. Step 5: Solve for x
    x = 69,688,074,836.52/428,316.30
  6. Step 6: Final answer
    x = 162,702.36

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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.