Home / 428,171.48-642,655.80-217,966.76

Finding the Fourth Proportional to 428,171.48, 642,655.80 and 217,966.76

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Solution

The fourth proportional to 428,171.48, 642,655.80 and 217,966.76 is: 327,153.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,171.48 : 642,655.80 = 217,966.76 : x
  2. Step 2: Convert to fraction form
    428,171.48/642,655.80 = 217,966.76/x
  3. Step 3: Cross multiply
    428,171.48x = 642,655.80 × 217,966.76
  4. Step 4: Simplify right side
    428,171.48x = 140,077,602,521.21
  5. Step 5: Solve for x
    x = 140,077,602,521.21/428,171.48
  6. Step 6: Final answer
    x = 327,153.04

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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.