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Finding the Fourth Proportional to 654.67, 981.24 and 288.69

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Solution

The fourth proportional to 654.67, 981.24 and 288.69 is: 432.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.67 : 981.24 = 288.69 : x
  2. Step 2: Convert to fraction form
    654.67/981.24 = 288.69/x
  3. Step 3: Cross multiply
    654.67x = 981.24 × 288.69
  4. Step 4: Simplify right side
    654.67x = 283,274.18
  5. Step 5: Solve for x
    x = 283,274.18/654.67
  6. Step 6: Final answer
    x = 432.70

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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.