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Finding the Fourth Proportional to 1,767.42, 2,439.18 and 981.54

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Solution

The fourth proportional to 1,767.42, 2,439.18 and 981.54 is: 1,354.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,767.42 : 2,439.18 = 981.54 : x
  2. Step 2: Convert to fraction form
    1,767.42/2,439.18 = 981.54/x
  3. Step 3: Cross multiply
    1,767.42x = 2,439.18 × 981.54
  4. Step 4: Simplify right side
    1,767.42x = 2,394,152.74
  5. Step 5: Solve for x
    x = 2,394,152.74/1,767.42
  6. Step 6: Final answer
    x = 1,354.60

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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.