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Finding the Fourth Proportional to 1,851.60, 2,775.28 and 876.32

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Solution

The fourth proportional to 1,851.60, 2,775.28 and 876.32 is: 1,313.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.60 : 2,775.28 = 876.32 : x
  2. Step 2: Convert to fraction form
    1,851.60/2,775.28 = 876.32/x
  3. Step 3: Cross multiply
    1,851.60x = 2,775.28 × 876.32
  4. Step 4: Simplify right side
    1,851.60x = 2,432,033.37
  5. Step 5: Solve for x
    x = 2,432,033.37/1,851.60
  6. Step 6: Final answer
    x = 1,313.48

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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.