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Finding the Fourth Proportional to 56.26, 83.98 and 51.45

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Solution

The fourth proportional to 56.26, 83.98 and 51.45 is: 76.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.26 : 83.98 = 51.45 : x
  2. Step 2: Convert to fraction form
    56.26/83.98 = 51.45/x
  3. Step 3: Cross multiply
    56.26x = 83.98 × 51.45
  4. Step 4: Simplify right side
    56.26x = 4,320.51
  5. Step 5: Solve for x
    x = 4,320.51/56.26
  6. Step 6: Final answer
    x = 76.80

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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.