Home / 1,341.20-1,851.17-817.13

Finding the Fourth Proportional to 1,341.20, 1,851.17 and 817.13

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Solution

The fourth proportional to 1,341.20, 1,851.17 and 817.13 is: 1,127.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,341.20 : 1,851.17 = 817.13 : x
  2. Step 2: Convert to fraction form
    1,341.20/1,851.17 = 817.13/x
  3. Step 3: Cross multiply
    1,341.20x = 1,851.17 × 817.13
  4. Step 4: Simplify right side
    1,341.20x = 1,512,633.20
  5. Step 5: Solve for x
    x = 1,512,633.20/1,341.20
  6. Step 6: Final answer
    x = 1,127.82

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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.