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Finding the Fourth Proportional to 658.67, 981.55 and 619.72

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Solution

The fourth proportional to 658.67, 981.55 and 619.72 is: 923.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.67 : 981.55 = 619.72 : x
  2. Step 2: Convert to fraction form
    658.67/981.55 = 619.72/x
  3. Step 3: Cross multiply
    658.67x = 981.55 × 619.72
  4. Step 4: Simplify right side
    658.67x = 608,284.49
  5. Step 5: Solve for x
    x = 608,284.49/658.67
  6. Step 6: Final answer
    x = 923.51

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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.