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Finding the Fourth Proportional to 1,781.54, 2,458.54 and 984.98

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Solution

The fourth proportional to 1,781.54, 2,458.54 and 984.98 is: 1,359.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.54 : 2,458.54 = 984.98 : x
  2. Step 2: Convert to fraction form
    1,781.54/2,458.54 = 984.98/x
  3. Step 3: Cross multiply
    1,781.54x = 2,458.54 × 984.98
  4. Step 4: Simplify right side
    1,781.54x = 2,421,612.73
  5. Step 5: Solve for x
    x = 2,421,612.73/1,781.54
  6. Step 6: Final answer
    x = 1,359.28

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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.