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Finding the Fourth Proportional to 2,547.42, 3,821.24 and 698.49

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Solution

The fourth proportional to 2,547.42, 3,821.24 and 698.49 is: 1,047.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,547.42 : 3,821.24 = 698.49 : x
  2. Step 2: Convert to fraction form
    2,547.42/3,821.24 = 698.49/x
  3. Step 3: Cross multiply
    2,547.42x = 3,821.24 × 698.49
  4. Step 4: Simplify right side
    2,547.42x = 2,669,097.93
  5. Step 5: Solve for x
    x = 2,669,097.93/2,547.42
  6. Step 6: Final answer
    x = 1,047.77

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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.