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Finding the Fourth Proportional to 45.53, 62.77 and 39.45

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Solution

The fourth proportional to 45.53, 62.77 and 39.45 is: 54.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.53 : 62.77 = 39.45 : x
  2. Step 2: Convert to fraction form
    45.53/62.77 = 39.45/x
  3. Step 3: Cross multiply
    45.53x = 62.77 × 39.45
  4. Step 4: Simplify right side
    45.53x = 2,476.28
  5. Step 5: Solve for x
    x = 2,476.28/45.53
  6. Step 6: Final answer
    x = 54.39

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Find fourth proportional to 22.77, 31.39 and 19.73
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1.5x scale

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.