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Finding the Fourth Proportional to 1,635.35, 2,452.55 and 647.71

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Solution

The fourth proportional to 1,635.35, 2,452.55 and 647.71 is: 971.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,635.35 : 2,452.55 = 647.71 : x
  2. Step 2: Convert to fraction form
    1,635.35/2,452.55 = 647.71/x
  3. Step 3: Cross multiply
    1,635.35x = 2,452.55 × 647.71
  4. Step 4: Simplify right side
    1,635.35x = 1,588,540.70
  5. Step 5: Solve for x
    x = 1,588,540.70/1,635.35
  6. Step 6: Final answer
    x = 971.38

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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.