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Finding the Fourth Proportional to 1,440.94, 1,988.22 and 881.53

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Solution

The fourth proportional to 1,440.94, 1,988.22 and 881.53 is: 1,216.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.94 : 1,988.22 = 881.53 : x
  2. Step 2: Convert to fraction form
    1,440.94/1,988.22 = 881.53/x
  3. Step 3: Cross multiply
    1,440.94x = 1,988.22 × 881.53
  4. Step 4: Simplify right side
    1,440.94x = 1,752,675.58
  5. Step 5: Solve for x
    x = 1,752,675.58/1,440.94
  6. Step 6: Final answer
    x = 1,216.34

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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.