Home / 1,281.04-1,767.40-756.72

Finding the Fourth Proportional to 1,281.04, 1,767.40 and 756.72

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Solution

The fourth proportional to 1,281.04, 1,767.40 and 756.72 is: 1,044.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.04 : 1,767.40 = 756.72 : x
  2. Step 2: Convert to fraction form
    1,281.04/1,767.40 = 756.72/x
  3. Step 3: Cross multiply
    1,281.04x = 1,767.40 × 756.72
  4. Step 4: Simplify right side
    1,281.04x = 1,337,426.93
  5. Step 5: Solve for x
    x = 1,337,426.93/1,281.04
  6. Step 6: Final answer
    x = 1,044.02

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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.