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Finding the Fourth Proportional to 56.93, 79.02 and 53.28

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Solution

The fourth proportional to 56.93, 79.02 and 53.28 is: 73.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.93 : 79.02 = 53.28 : x
  2. Step 2: Convert to fraction form
    56.93/79.02 = 53.28/x
  3. Step 3: Cross multiply
    56.93x = 79.02 × 53.28
  4. Step 4: Simplify right side
    56.93x = 4,210.19
  5. Step 5: Solve for x
    x = 4,210.19/56.93
  6. Step 6: Final answer
    x = 73.96

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.