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Finding the Fourth Proportional to 1,260.68, 1,740.31 and 756.77

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Solution

The fourth proportional to 1,260.68, 1,740.31 and 756.77 is: 1,044.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.68 : 1,740.31 = 756.77 : x
  2. Step 2: Convert to fraction form
    1,260.68/1,740.31 = 756.77/x
  3. Step 3: Cross multiply
    1,260.68x = 1,740.31 × 756.77
  4. Step 4: Simplify right side
    1,260.68x = 1,317,003.81
  5. Step 5: Solve for x
    x = 1,317,003.81/1,260.68
  6. Step 6: Final answer
    x = 1,044.68

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Half scale
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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.