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Finding the Fourth Proportional to 1,190.80, 1,778.10 and 1,050.81

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Solution

The fourth proportional to 1,190.80, 1,778.10 and 1,050.81 is: 1,569.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.80 : 1,778.10 = 1,050.81 : x
  2. Step 2: Convert to fraction form
    1,190.80/1,778.10 = 1,050.81/x
  3. Step 3: Cross multiply
    1,190.80x = 1,778.10 × 1,050.81
  4. Step 4: Simplify right side
    1,190.80x = 1,868,445.26
  5. Step 5: Solve for x
    x = 1,868,445.26/1,190.80
  6. Step 6: Final answer
    x = 1,569.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.