Home / 1,240.19-1,858.50-746.80

Finding the Fourth Proportional to 1,240.19, 1,858.50 and 746.80

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Solution

The fourth proportional to 1,240.19, 1,858.50 and 746.80 is: 1,119.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.19 : 1,858.50 = 746.80 : x
  2. Step 2: Convert to fraction form
    1,240.19/1,858.50 = 746.80/x
  3. Step 3: Cross multiply
    1,240.19x = 1,858.50 × 746.80
  4. Step 4: Simplify right side
    1,240.19x = 1,387,927.80
  5. Step 5: Solve for x
    x = 1,387,927.80/1,240.19
  6. Step 6: Final answer
    x = 1,119.13

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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.