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Finding the Fourth Proportional to 1,631.90, 2,448.92 and 810.88

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Solution

The fourth proportional to 1,631.90, 2,448.92 and 810.88 is: 1,216.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.90 : 2,448.92 = 810.88 : x
  2. Step 2: Convert to fraction form
    1,631.90/2,448.92 = 810.88/x
  3. Step 3: Cross multiply
    1,631.90x = 2,448.92 × 810.88
  4. Step 4: Simplify right side
    1,631.90x = 1,985,780.25
  5. Step 5: Solve for x
    x = 1,985,780.25/1,631.90
  6. Step 6: Final answer
    x = 1,216.85

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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.