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Finding the Fourth Proportional to 1,424.19, 1,965.30 and 794.78

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Solution

The fourth proportional to 1,424.19, 1,965.30 and 794.78 is: 1,096.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.19 : 1,965.30 = 794.78 : x
  2. Step 2: Convert to fraction form
    1,424.19/1,965.30 = 794.78/x
  3. Step 3: Cross multiply
    1,424.19x = 1,965.30 × 794.78
  4. Step 4: Simplify right side
    1,424.19x = 1,561,981.13
  5. Step 5: Solve for x
    x = 1,561,981.13/1,424.19
  6. Step 6: Final answer
    x = 1,096.75

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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.