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Finding the Fourth Proportional to 438.49, 657.50 and 284.49

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Solution

The fourth proportional to 438.49, 657.50 and 284.49 is: 426.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.49 : 657.50 = 284.49 : x
  2. Step 2: Convert to fraction form
    438.49/657.50 = 284.49/x
  3. Step 3: Cross multiply
    438.49x = 657.50 × 284.49
  4. Step 4: Simplify right side
    438.49x = 187,052.18
  5. Step 5: Solve for x
    x = 187,052.18/438.49
  6. Step 6: Final answer
    x = 426.58

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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.