Home / 1,129.30-1,556.13-798.10

Finding the Fourth Proportional to 1,129.30, 1,556.13 and 798.10

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Solution

The fourth proportional to 1,129.30, 1,556.13 and 798.10 is: 1,099.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129.30 : 1,556.13 = 798.10 : x
  2. Step 2: Convert to fraction form
    1,129.30/1,556.13 = 798.10/x
  3. Step 3: Cross multiply
    1,129.30x = 1,556.13 × 798.10
  4. Step 4: Simplify right side
    1,129.30x = 1,241,947.35
  5. Step 5: Solve for x
    x = 1,241,947.35/1,129.30
  6. Step 6: Final answer
    x = 1,099.75

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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.