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Finding the Fourth Proportional to 2,805.13, 4,207.69 and 753.13

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Solution

The fourth proportional to 2,805.13, 4,207.69 and 753.13 is: 1,129.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,805.13 : 4,207.69 = 753.13 : x
  2. Step 2: Convert to fraction form
    2,805.13/4,207.69 = 753.13/x
  3. Step 3: Cross multiply
    2,805.13x = 4,207.69 × 753.13
  4. Step 4: Simplify right side
    2,805.13x = 3,168,916.53
  5. Step 5: Solve for x
    x = 3,168,916.53/2,805.13
  6. Step 6: Final answer
    x = 1,129.69

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.