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Finding the Fourth Proportional to 1,294.29, 1,786.12 and 763.18

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Solution

The fourth proportional to 1,294.29, 1,786.12 and 763.18 is: 1,053.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.29 : 1,786.12 = 763.18 : x
  2. Step 2: Convert to fraction form
    1,294.29/1,786.12 = 763.18/x
  3. Step 3: Cross multiply
    1,294.29x = 1,786.12 × 763.18
  4. Step 4: Simplify right side
    1,294.29x = 1,363,131.06
  5. Step 5: Solve for x
    x = 1,363,131.06/1,294.29
  6. Step 6: Final answer
    x = 1,053.19

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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.