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Finding the Fourth Proportional to 52.30, 78 and 49.74

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Solution

The fourth proportional to 52.30, 78 and 49.74 is: 74.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.30 : 78 = 49.74 : x
  2. Step 2: Convert to fraction form
    52.30/78 = 49.74/x
  3. Step 3: Cross multiply
    52.30x = 78 × 49.74
  4. Step 4: Simplify right side
    52.30x = 3,879.72
  5. Step 5: Solve for x
    x = 3,879.72/52.30
  6. Step 6: Final answer
    x = 74.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.