Home / 1,309.55-1,799.48-1,047.11

Finding the Fourth Proportional to 1,309.55, 1,799.48 and 1,047.11

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Solution

The fourth proportional to 1,309.55, 1,799.48 and 1,047.11 is: 1,438.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.55 : 1,799.48 = 1,047.11 : x
  2. Step 2: Convert to fraction form
    1,309.55/1,799.48 = 1,047.11/x
  3. Step 3: Cross multiply
    1,309.55x = 1,799.48 × 1,047.11
  4. Step 4: Simplify right side
    1,309.55x = 1,884,239.27
  5. Step 5: Solve for x
    x = 1,884,239.27/1,309.55
  6. Step 6: Final answer
    x = 1,438.85

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.