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Finding the Fourth Proportional to 56.64, 85.30 and 50.68

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Solution

The fourth proportional to 56.64, 85.30 and 50.68 is: 76.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.64 : 85.30 = 50.68 : x
  2. Step 2: Convert to fraction form
    56.64/85.30 = 50.68/x
  3. Step 3: Cross multiply
    56.64x = 85.30 × 50.68
  4. Step 4: Simplify right side
    56.64x = 4,323.00
  5. Step 5: Solve for x
    x = 4,323.00/56.64
  6. Step 6: Final answer
    x = 76.32

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.