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Finding the Fourth Proportional to 1,289.10, 1,775.07 and 1,101.18

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Solution

The fourth proportional to 1,289.10, 1,775.07 and 1,101.18 is: 1,516.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.10 : 1,775.07 = 1,101.18 : x
  2. Step 2: Convert to fraction form
    1,289.10/1,775.07 = 1,101.18/x
  3. Step 3: Cross multiply
    1,289.10x = 1,775.07 × 1,101.18
  4. Step 4: Simplify right side
    1,289.10x = 1,954,671.58
  5. Step 5: Solve for x
    x = 1,954,671.58/1,289.10
  6. Step 6: Final answer
    x = 1,516.31

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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.