Home / 1,440.40-1,987.26-943.60

Finding the Fourth Proportional to 1,440.40, 1,987.26 and 943.60

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Solution

The fourth proportional to 1,440.40, 1,987.26 and 943.60 is: 1,301.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.40 : 1,987.26 = 943.60 : x
  2. Step 2: Convert to fraction form
    1,440.40/1,987.26 = 943.60/x
  3. Step 3: Cross multiply
    1,440.40x = 1,987.26 × 943.60
  4. Step 4: Simplify right side
    1,440.40x = 1,875,178.54
  5. Step 5: Solve for x
    x = 1,875,178.54/1,440.40
  6. Step 6: Final answer
    x = 1,301.85

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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.