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Finding the Fourth Proportional to 652.50, 977.38 and 287.55

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Solution

The fourth proportional to 652.50, 977.38 and 287.55 is: 430.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.50 : 977.38 = 287.55 : x
  2. Step 2: Convert to fraction form
    652.50/977.38 = 287.55/x
  3. Step 3: Cross multiply
    652.50x = 977.38 × 287.55
  4. Step 4: Simplify right side
    652.50x = 281,040.73
  5. Step 5: Solve for x
    x = 281,040.73/652.50
  6. Step 6: Final answer
    x = 430.71

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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.