Home / 1,851.48-2,780.34-1,239.12

Finding the Fourth Proportional to 1,851.48, 2,780.34 and 1,239.12

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Solution

The fourth proportional to 1,851.48, 2,780.34 and 1,239.12 is: 1,860.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.48 : 2,780.34 = 1,239.12 : x
  2. Step 2: Convert to fraction form
    1,851.48/2,780.34 = 1,239.12/x
  3. Step 3: Cross multiply
    1,851.48x = 2,780.34 × 1,239.12
  4. Step 4: Simplify right side
    1,851.48x = 3,445,174.90
  5. Step 5: Solve for x
    x = 3,445,174.90/1,851.48
  6. Step 6: Final answer
    x = 1,860.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.