Home / 1,410.11-1,945.97-780.63

Finding the Fourth Proportional to 1,410.11, 1,945.97 and 780.63

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Solution

The fourth proportional to 1,410.11, 1,945.97 and 780.63 is: 1,077.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,410.11 : 1,945.97 = 780.63 : x
  2. Step 2: Convert to fraction form
    1,410.11/1,945.97 = 780.63/x
  3. Step 3: Cross multiply
    1,410.11x = 1,945.97 × 780.63
  4. Step 4: Simplify right side
    1,410.11x = 1,519,082.56
  5. Step 5: Solve for x
    x = 1,519,082.56/1,410.11
  6. Step 6: Final answer
    x = 1,077.28

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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.