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Finding the Fourth Proportional to 1,440.46, 1,988.34 and 881.32

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Solution

The fourth proportional to 1,440.46, 1,988.34 and 881.32 is: 1,216.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.46 : 1,988.34 = 881.32 : x
  2. Step 2: Convert to fraction form
    1,440.46/1,988.34 = 881.32/x
  3. Step 3: Cross multiply
    1,440.46x = 1,988.34 × 881.32
  4. Step 4: Simplify right side
    1,440.46x = 1,752,363.81
  5. Step 5: Solve for x
    x = 1,752,363.81/1,440.46
  6. Step 6: Final answer
    x = 1,216.53

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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.