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Finding the Fourth Proportional to 45.30, 62.50 and 28.92

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Solution

The fourth proportional to 45.30, 62.50 and 28.92 is: 39.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.30 : 62.50 = 28.92 : x
  2. Step 2: Convert to fraction form
    45.30/62.50 = 28.92/x
  3. Step 3: Cross multiply
    45.30x = 62.50 × 28.92
  4. Step 4: Simplify right side
    45.30x = 1,807.50
  5. Step 5: Solve for x
    x = 1,807.50/45.30
  6. Step 6: Final answer
    x = 39.90

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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.