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Finding the Fourth Proportional to 62.90, 94.44 and 56.40

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Solution

The fourth proportional to 62.90, 94.44 and 56.40 is: 84.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.90 : 94.44 = 56.40 : x
  2. Step 2: Convert to fraction form
    62.90/94.44 = 56.40/x
  3. Step 3: Cross multiply
    62.90x = 94.44 × 56.40
  4. Step 4: Simplify right side
    62.90x = 5,326.42
  5. Step 5: Solve for x
    x = 5,326.42/62.90
  6. Step 6: Final answer
    x = 84.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.