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Finding the Fourth Proportional to 1,851.30, 2,776.92 and 552.78

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Solution

The fourth proportional to 1,851.30, 2,776.92 and 552.78 is: 829.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.30 : 2,776.92 = 552.78 : x
  2. Step 2: Convert to fraction form
    1,851.30/2,776.92 = 552.78/x
  3. Step 3: Cross multiply
    1,851.30x = 2,776.92 × 552.78
  4. Step 4: Simplify right side
    1,851.30x = 1,535,025.84
  5. Step 5: Solve for x
    x = 1,535,025.84/1,851.30
  6. Step 6: Final answer
    x = 829.16

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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.