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Finding the Fourth Proportional to 1,263.36, 1,740.72 and 908.15

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Solution

The fourth proportional to 1,263.36, 1,740.72 and 908.15 is: 1,251.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.36 : 1,740.72 = 908.15 : x
  2. Step 2: Convert to fraction form
    1,263.36/1,740.72 = 908.15/x
  3. Step 3: Cross multiply
    1,263.36x = 1,740.72 × 908.15
  4. Step 4: Simplify right side
    1,263.36x = 1,580,826.16
  5. Step 5: Solve for x
    x = 1,580,826.16/1,263.36
  6. Step 6: Final answer
    x = 1,251.29

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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.