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Finding the Fourth Proportional to 1,294.31, 1,786.19 and 734.76

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Solution

The fourth proportional to 1,294.31, 1,786.19 and 734.76 is: 1,013.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.31 : 1,786.19 = 734.76 : x
  2. Step 2: Convert to fraction form
    1,294.31/1,786.19 = 734.76/x
  3. Step 3: Cross multiply
    1,294.31x = 1,786.19 × 734.76
  4. Step 4: Simplify right side
    1,294.31x = 1,312,417.29
  5. Step 5: Solve for x
    x = 1,312,417.29/1,294.31
  6. Step 6: Final answer
    x = 1,013.99

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Double scale
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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.