Home / 1,265.34-1,740.86-1,115.28

Finding the Fourth Proportional to 1,265.34, 1,740.86 and 1,115.28

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Solution

The fourth proportional to 1,265.34, 1,740.86 and 1,115.28 is: 1,534.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.34 : 1,740.86 = 1,115.28 : x
  2. Step 2: Convert to fraction form
    1,265.34/1,740.86 = 1,115.28/x
  3. Step 3: Cross multiply
    1,265.34x = 1,740.86 × 1,115.28
  4. Step 4: Simplify right side
    1,265.34x = 1,941,546.34
  5. Step 5: Solve for x
    x = 1,941,546.34/1,265.34
  6. Step 6: Final answer
    x = 1,534.41

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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.