Home / 1,291.80-1,781.78-1,094.96

Finding the Fourth Proportional to 1,291.80, 1,781.78 and 1,094.96

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Solution

The fourth proportional to 1,291.80, 1,781.78 and 1,094.96 is: 1,510.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.80 : 1,781.78 = 1,094.96 : x
  2. Step 2: Convert to fraction form
    1,291.80/1,781.78 = 1,094.96/x
  3. Step 3: Cross multiply
    1,291.80x = 1,781.78 × 1,094.96
  4. Step 4: Simplify right side
    1,291.80x = 1,950,977.83
  5. Step 5: Solve for x
    x = 1,950,977.83/1,291.80
  6. Step 6: Final answer
    x = 1,510.28

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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.