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Finding the Fourth Proportional to 1,375.79, 2,074.47 and 1,260.98

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Solution

The fourth proportional to 1,375.79, 2,074.47 and 1,260.98 is: 1,901.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.79 : 2,074.47 = 1,260.98 : x
  2. Step 2: Convert to fraction form
    1,375.79/2,074.47 = 1,260.98/x
  3. Step 3: Cross multiply
    1,375.79x = 2,074.47 × 1,260.98
  4. Step 4: Simplify right side
    1,375.79x = 2,615,854.81
  5. Step 5: Solve for x
    x = 2,615,854.81/1,375.79
  6. Step 6: Final answer
    x = 1,901.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.