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Finding the Fourth Proportional to 1,201.41, 1,657.80 and 677.34

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Solution

The fourth proportional to 1,201.41, 1,657.80 and 677.34 is: 934.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.41 : 1,657.80 = 677.34 : x
  2. Step 2: Convert to fraction form
    1,201.41/1,657.80 = 677.34/x
  3. Step 3: Cross multiply
    1,201.41x = 1,657.80 × 677.34
  4. Step 4: Simplify right side
    1,201.41x = 1,122,894.25
  5. Step 5: Solve for x
    x = 1,122,894.25/1,201.41
  6. Step 6: Final answer
    x = 934.65

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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.