Home / 1,239.30-1,710.72-1,108.08

Finding the Fourth Proportional to 1,239.30, 1,710.72 and 1,108.08

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Solution

The fourth proportional to 1,239.30, 1,710.72 and 1,108.08 is: 1,529.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.30 : 1,710.72 = 1,108.08 : x
  2. Step 2: Convert to fraction form
    1,239.30/1,710.72 = 1,108.08/x
  3. Step 3: Cross multiply
    1,239.30x = 1,710.72 × 1,108.08
  4. Step 4: Simplify right side
    1,239.30x = 1,895,614.62
  5. Step 5: Solve for x
    x = 1,895,614.62/1,239.30
  6. Step 6: Final answer
    x = 1,529.58

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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.