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Finding the Fourth Proportional to 1,882.17, 2,821.56 and 648.71

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Solution

The fourth proportional to 1,882.17, 2,821.56 and 648.71 is: 972.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,882.17 : 2,821.56 = 648.71 : x
  2. Step 2: Convert to fraction form
    1,882.17/2,821.56 = 648.71/x
  3. Step 3: Cross multiply
    1,882.17x = 2,821.56 × 648.71
  4. Step 4: Simplify right side
    1,882.17x = 1,830,360.08
  5. Step 5: Solve for x
    x = 1,830,360.08/1,882.17
  6. Step 6: Final answer
    x = 972.47

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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.