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Finding the Fourth Proportional to 1,440.75, 1,987.41 and 943.29

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Solution

The fourth proportional to 1,440.75, 1,987.41 and 943.29 is: 1,301.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.75 : 1,987.41 = 943.29 : x
  2. Step 2: Convert to fraction form
    1,440.75/1,987.41 = 943.29/x
  3. Step 3: Cross multiply
    1,440.75x = 1,987.41 × 943.29
  4. Step 4: Simplify right side
    1,440.75x = 1,874,703.98
  5. Step 5: Solve for x
    x = 1,874,703.98/1,440.75
  6. Step 6: Final answer
    x = 1,301.20

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Half scale
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Double scale
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1.5x scale

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.