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Finding the Fourth Proportional to 1,261.96, 1,890.80 and 894.92

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Solution

The fourth proportional to 1,261.96, 1,890.80 and 894.92 is: 1,340.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.96 : 1,890.80 = 894.92 : x
  2. Step 2: Convert to fraction form
    1,261.96/1,890.80 = 894.92/x
  3. Step 3: Cross multiply
    1,261.96x = 1,890.80 × 894.92
  4. Step 4: Simplify right side
    1,261.96x = 1,692,114.74
  5. Step 5: Solve for x
    x = 1,692,114.74/1,261.96
  6. Step 6: Final answer
    x = 1,340.86

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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.