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Finding the Fourth Proportional to 1,440.54, 1,987.36 and 834.48

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Solution

The fourth proportional to 1,440.54, 1,987.36 and 834.48 is: 1,151.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.54 : 1,987.36 = 834.48 : x
  2. Step 2: Convert to fraction form
    1,440.54/1,987.36 = 834.48/x
  3. Step 3: Cross multiply
    1,440.54x = 1,987.36 × 834.48
  4. Step 4: Simplify right side
    1,440.54x = 1,658,408.00
  5. Step 5: Solve for x
    x = 1,658,408.00/1,440.54
  6. Step 6: Final answer
    x = 1,151.24

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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.