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Finding the Fourth Proportional to 648.47, 895.69 and 471.15

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Solution

The fourth proportional to 648.47, 895.69 and 471.15 is: 650.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.47 : 895.69 = 471.15 : x
  2. Step 2: Convert to fraction form
    648.47/895.69 = 471.15/x
  3. Step 3: Cross multiply
    648.47x = 895.69 × 471.15
  4. Step 4: Simplify right side
    648.47x = 422,002.94
  5. Step 5: Solve for x
    x = 422,002.94/648.47
  6. Step 6: Final answer
    x = 650.76

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.