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Finding the Fourth Proportional to 1,278.56, 1,918.92 and 883.02

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Solution

The fourth proportional to 1,278.56, 1,918.92 and 883.02 is: 1,325.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.56 : 1,918.92 = 883.02 : x
  2. Step 2: Convert to fraction form
    1,278.56/1,918.92 = 883.02/x
  3. Step 3: Cross multiply
    1,278.56x = 1,918.92 × 883.02
  4. Step 4: Simplify right side
    1,278.56x = 1,694,444.74
  5. Step 5: Solve for x
    x = 1,694,444.74/1,278.56
  6. Step 6: Final answer
    x = 1,325.28

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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.