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Finding the Fourth Proportional to 56.15, 83.63 and 55.52

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Solution

The fourth proportional to 56.15, 83.63 and 55.52 is: 82.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.15 : 83.63 = 55.52 : x
  2. Step 2: Convert to fraction form
    56.15/83.63 = 55.52/x
  3. Step 3: Cross multiply
    56.15x = 83.63 × 55.52
  4. Step 4: Simplify right side
    56.15x = 4,643.14
  5. Step 5: Solve for x
    x = 4,643.14/56.15
  6. Step 6: Final answer
    x = 82.69

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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.