Home / 1,281.20-1,768.08-757.23

Finding the Fourth Proportional to 1,281.20, 1,768.08 and 757.23

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Solution

The fourth proportional to 1,281.20, 1,768.08 and 757.23 is: 1,045.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.20 : 1,768.08 = 757.23 : x
  2. Step 2: Convert to fraction form
    1,281.20/1,768.08 = 757.23/x
  3. Step 3: Cross multiply
    1,281.20x = 1,768.08 × 757.23
  4. Step 4: Simplify right side
    1,281.20x = 1,338,843.22
  5. Step 5: Solve for x
    x = 1,338,843.22/1,281.20
  6. Step 6: Final answer
    x = 1,045.00

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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.