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Finding the Fourth Proportional to 462.28, 637.86 and 287.50

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Solution

The fourth proportional to 462.28, 637.86 and 287.50 is: 396.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.28 : 637.86 = 287.50 : x
  2. Step 2: Convert to fraction form
    462.28/637.86 = 287.50/x
  3. Step 3: Cross multiply
    462.28x = 637.86 × 287.50
  4. Step 4: Simplify right side
    462.28x = 183,384.75
  5. Step 5: Solve for x
    x = 183,384.75/462.28
  6. Step 6: Final answer
    x = 396.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.