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Finding the Fourth Proportional to 653.64, 981.82 and 631.78

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Solution

The fourth proportional to 653.64, 981.82 and 631.78 is: 948.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.64 : 981.82 = 631.78 : x
  2. Step 2: Convert to fraction form
    653.64/981.82 = 631.78/x
  3. Step 3: Cross multiply
    653.64x = 981.82 × 631.78
  4. Step 4: Simplify right side
    653.64x = 620,294.24
  5. Step 5: Solve for x
    x = 620,294.24/653.64
  6. Step 6: Final answer
    x = 948.98

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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.