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Finding the Fourth Proportional to 2,547.72, 3,821.58 and 817.56

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Solution

The fourth proportional to 2,547.72, 3,821.58 and 817.56 is: 1,226.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,547.72 : 3,821.58 = 817.56 : x
  2. Step 2: Convert to fraction form
    2,547.72/3,821.58 = 817.56/x
  3. Step 3: Cross multiply
    2,547.72x = 3,821.58 × 817.56
  4. Step 4: Simplify right side
    2,547.72x = 3,124,370.94
  5. Step 5: Solve for x
    x = 3,124,370.94/2,547.72
  6. Step 6: Final answer
    x = 1,226.34

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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.