Home / 428,118.48-642,576.24-217,913.76

Finding the Fourth Proportional to 428,118.48, 642,576.24 and 217,913.76

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Solution

The fourth proportional to 428,118.48, 642,576.24 and 217,913.76 is: 327,073.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,118.48 : 642,576.24 = 217,913.76 : x
  2. Step 2: Convert to fraction form
    428,118.48/642,576.24 = 217,913.76/x
  3. Step 3: Cross multiply
    428,118.48x = 642,576.24 × 217,913.76
  4. Step 4: Simplify right side
    428,118.48x = 140,026,204,545.06
  5. Step 5: Solve for x
    x = 140,026,204,545.06/428,118.48
  6. Step 6: Final answer
    x = 327,073.49

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1.5x scale

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.