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Finding the Fourth Proportional to 53.04, 79.60 and 42.48

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Solution

The fourth proportional to 53.04, 79.60 and 42.48 is: 63.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.04 : 79.60 = 42.48 : x
  2. Step 2: Convert to fraction form
    53.04/79.60 = 42.48/x
  3. Step 3: Cross multiply
    53.04x = 79.60 × 42.48
  4. Step 4: Simplify right side
    53.04x = 3,381.41
  5. Step 5: Solve for x
    x = 3,381.41/53.04
  6. Step 6: Final answer
    x = 63.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.