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Finding the Fourth Proportional to 1,034.76, 1,427.36 and 680.74

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Solution

The fourth proportional to 1,034.76, 1,427.36 and 680.74 is: 939.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,034.76 : 1,427.36 = 680.74 : x
  2. Step 2: Convert to fraction form
    1,034.76/1,427.36 = 680.74/x
  3. Step 3: Cross multiply
    1,034.76x = 1,427.36 × 680.74
  4. Step 4: Simplify right side
    1,034.76x = 971,661.05
  5. Step 5: Solve for x
    x = 971,661.05/1,034.76
  6. Step 6: Final answer
    x = 939.02

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1.5x scale

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.