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Finding the Fourth Proportional to 45.24, 68.24 and 39.30

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Solution

The fourth proportional to 45.24, 68.24 and 39.30 is: 59.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.24 : 68.24 = 39.30 : x
  2. Step 2: Convert to fraction form
    45.24/68.24 = 39.30/x
  3. Step 3: Cross multiply
    45.24x = 68.24 × 39.30
  4. Step 4: Simplify right side
    45.24x = 2,681.64
  5. Step 5: Solve for x
    x = 2,681.64/45.24
  6. Step 6: Final answer
    x = 59.28

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.