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Finding the Fourth Proportional to 45.30, 62.32 and 39.45

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Solution

The fourth proportional to 45.30, 62.32 and 39.45 is: 54.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.30 : 62.32 = 39.45 : x
  2. Step 2: Convert to fraction form
    45.30/62.32 = 39.45/x
  3. Step 3: Cross multiply
    45.30x = 62.32 × 39.45
  4. Step 4: Simplify right side
    45.30x = 2,458.52
  5. Step 5: Solve for x
    x = 2,458.52/45.30
  6. Step 6: Final answer
    x = 54.27

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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.