Home / 1,239.12-1,701.54-1,108.08

Finding the Fourth Proportional to 1,239.12, 1,701.54 and 1,108.08

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Solution

The fourth proportional to 1,239.12, 1,701.54 and 1,108.08 is: 1,521.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.12 : 1,701.54 = 1,108.08 : x
  2. Step 2: Convert to fraction form
    1,239.12/1,701.54 = 1,108.08/x
  3. Step 3: Cross multiply
    1,239.12x = 1,701.54 × 1,108.08
  4. Step 4: Simplify right side
    1,239.12x = 1,885,442.44
  5. Step 5: Solve for x
    x = 1,885,442.44/1,239.12
  6. Step 6: Final answer
    x = 1,521.60

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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.