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Finding the Fourth Proportional to 52.83, 78.90 and 47.34

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Solution

The fourth proportional to 52.83, 78.90 and 47.34 is: 70.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.83 : 78.90 = 47.34 : x
  2. Step 2: Convert to fraction form
    52.83/78.90 = 47.34/x
  3. Step 3: Cross multiply
    52.83x = 78.90 × 47.34
  4. Step 4: Simplify right side
    52.83x = 3,735.13
  5. Step 5: Solve for x
    x = 3,735.13/52.83
  6. Step 6: Final answer
    x = 70.70

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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.