Home / 1,630.16-2,249.57-921.95

Finding the Fourth Proportional to 1,630.16, 2,249.57 and 921.95

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Solution

The fourth proportional to 1,630.16, 2,249.57 and 921.95 is: 1,272.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,630.16 : 2,249.57 = 921.95 : x
  2. Step 2: Convert to fraction form
    1,630.16/2,249.57 = 921.95/x
  3. Step 3: Cross multiply
    1,630.16x = 2,249.57 × 921.95
  4. Step 4: Simplify right side
    1,630.16x = 2,073,990.55
  5. Step 5: Solve for x
    x = 2,073,990.55/1,630.16
  6. Step 6: Final answer
    x = 1,272.26

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1.5x scale

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.