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Finding the Fourth Proportional to 1,820.90, 2,512.85 and 1,034.90

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Solution

The fourth proportional to 1,820.90, 2,512.85 and 1,034.90 is: 1,428.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,820.90 : 2,512.85 = 1,034.90 : x
  2. Step 2: Convert to fraction form
    1,820.90/2,512.85 = 1,034.90/x
  3. Step 3: Cross multiply
    1,820.90x = 2,512.85 × 1,034.90
  4. Step 4: Simplify right side
    1,820.90x = 2,600,548.47
  5. Step 5: Solve for x
    x = 2,600,548.47/1,820.90
  6. Step 6: Final answer
    x = 1,428.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.