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Finding the Fourth Proportional to 52.64, 78.72 and 37.40

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Solution

The fourth proportional to 52.64, 78.72 and 37.40 is: 55.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.64 : 78.72 = 37.40 : x
  2. Step 2: Convert to fraction form
    52.64/78.72 = 37.40/x
  3. Step 3: Cross multiply
    52.64x = 78.72 × 37.40
  4. Step 4: Simplify right side
    52.64x = 2,944.13
  5. Step 5: Solve for x
    x = 2,944.13/52.64
  6. Step 6: Final answer
    x = 55.93

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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.