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Finding the Fourth Proportional to 1,040.19, 1,434.84 and 620.27

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Solution

The fourth proportional to 1,040.19, 1,434.84 and 620.27 is: 855.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.19 : 1,434.84 = 620.27 : x
  2. Step 2: Convert to fraction form
    1,040.19/1,434.84 = 620.27/x
  3. Step 3: Cross multiply
    1,040.19x = 1,434.84 × 620.27
  4. Step 4: Simplify right side
    1,040.19x = 889,977.93
  5. Step 5: Solve for x
    x = 889,977.93/1,040.19
  6. Step 6: Final answer
    x = 855.59

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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.