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Finding the Fourth Proportional to 424.34, 637.02 and 287.98

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Solution

The fourth proportional to 424.34, 637.02 and 287.98 is: 432.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.34 : 637.02 = 287.98 : x
  2. Step 2: Convert to fraction form
    424.34/637.02 = 287.98/x
  3. Step 3: Cross multiply
    424.34x = 637.02 × 287.98
  4. Step 4: Simplify right side
    424.34x = 183,449.02
  5. Step 5: Solve for x
    x = 183,449.02/424.34
  6. Step 6: Final answer
    x = 432.32

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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.