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Finding the Fourth Proportional to 1,621.74, 2,433.72 and 881.40

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Solution

The fourth proportional to 1,621.74, 2,433.72 and 881.40 is: 1,322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.74 : 2,433.72 = 881.40 : x
  2. Step 2: Convert to fraction form
    1,621.74/2,433.72 = 881.40/x
  3. Step 3: Cross multiply
    1,621.74x = 2,433.72 × 881.40
  4. Step 4: Simplify right side
    1,621.74x = 2,145,080.81
  5. Step 5: Solve for x
    x = 2,145,080.81/1,621.74
  6. Step 6: Final answer
    x = 1,322.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.