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Finding the Fourth Proportional to 53.02, 79.64 and 51.29

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Solution

The fourth proportional to 53.02, 79.64 and 51.29 is: 77.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.02 : 79.64 = 51.29 : x
  2. Step 2: Convert to fraction form
    53.02/79.64 = 51.29/x
  3. Step 3: Cross multiply
    53.02x = 79.64 × 51.29
  4. Step 4: Simplify right side
    53.02x = 4,084.67
  5. Step 5: Solve for x
    x = 4,084.67/53.02
  6. Step 6: Final answer
    x = 77.04

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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.