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Finding the Fourth Proportional to 2,547.71, 3,821.56 and 698.85

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Solution

The fourth proportional to 2,547.71, 3,821.56 and 698.85 is: 1,048.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,547.71 : 3,821.56 = 698.85 : x
  2. Step 2: Convert to fraction form
    2,547.71/3,821.56 = 698.85/x
  3. Step 3: Cross multiply
    2,547.71x = 3,821.56 × 698.85
  4. Step 4: Simplify right side
    2,547.71x = 2,670,679.85
  5. Step 5: Solve for x
    x = 2,670,679.85/2,547.71
  6. Step 6: Final answer
    x = 1,048.27

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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.