Home / 1,075.24-1,483.65-721.75

Finding the Fourth Proportional to 1,075.24, 1,483.65 and 721.75

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Solution

The fourth proportional to 1,075.24, 1,483.65 and 721.75 is: 995.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.24 : 1,483.65 = 721.75 : x
  2. Step 2: Convert to fraction form
    1,075.24/1,483.65 = 721.75/x
  3. Step 3: Cross multiply
    1,075.24x = 1,483.65 × 721.75
  4. Step 4: Simplify right side
    1,075.24x = 1,070,819.85
  5. Step 5: Solve for x
    x = 1,070,819.85/1,075.24
  6. Step 6: Final answer
    x = 995.89

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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.