Home / 1,421.17-1,961.22-800.17

Finding the Fourth Proportional to 1,421.17, 1,961.22 and 800.17

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Solution

The fourth proportional to 1,421.17, 1,961.22 and 800.17 is: 1,104.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.17 : 1,961.22 = 800.17 : x
  2. Step 2: Convert to fraction form
    1,421.17/1,961.22 = 800.17/x
  3. Step 3: Cross multiply
    1,421.17x = 1,961.22 × 800.17
  4. Step 4: Simplify right side
    1,421.17x = 1,569,309.41
  5. Step 5: Solve for x
    x = 1,569,309.41/1,421.17
  6. Step 6: Final answer
    x = 1,104.24

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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.