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Finding the Fourth Proportional to 653.49, 979.49 and 263.39

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Solution

The fourth proportional to 653.49, 979.49 and 263.39 is: 394.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.49 : 979.49 = 263.39 : x
  2. Step 2: Convert to fraction form
    653.49/979.49 = 263.39/x
  3. Step 3: Cross multiply
    653.49x = 979.49 × 263.39
  4. Step 4: Simplify right side
    653.49x = 257,983.63
  5. Step 5: Solve for x
    x = 257,983.63/653.49
  6. Step 6: Final answer
    x = 394.78

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Double scale
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1.5x scale

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.