Home / 1,465.17-2,189.89-1,278.60

Finding the Fourth Proportional to 1,465.17, 2,189.89 and 1,278.60

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Solution

The fourth proportional to 1,465.17, 2,189.89 and 1,278.60 is: 1,911.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,465.17 : 2,189.89 = 1,278.60 : x
  2. Step 2: Convert to fraction form
    1,465.17/2,189.89 = 1,278.60/x
  3. Step 3: Cross multiply
    1,465.17x = 2,189.89 × 1,278.60
  4. Step 4: Simplify right side
    1,465.17x = 2,799,993.35
  5. Step 5: Solve for x
    x = 2,799,993.35/1,465.17
  6. Step 6: Final answer
    x = 1,911.04

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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.