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Finding the Fourth Proportional to 1,547.68, 2,319.88 and 725.26

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Solution

The fourth proportional to 1,547.68, 2,319.88 and 725.26 is: 1,087.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.68 : 2,319.88 = 725.26 : x
  2. Step 2: Convert to fraction form
    1,547.68/2,319.88 = 725.26/x
  3. Step 3: Cross multiply
    1,547.68x = 2,319.88 × 725.26
  4. Step 4: Simplify right side
    1,547.68x = 1,682,516.17
  5. Step 5: Solve for x
    x = 1,682,516.17/1,547.68
  6. Step 6: Final answer
    x = 1,087.12

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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.