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Finding the Fourth Proportional to 1,030.62, 1,422.15 and 611.01

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Solution

The fourth proportional to 1,030.62, 1,422.15 and 611.01 is: 843.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.62 : 1,422.15 = 611.01 : x
  2. Step 2: Convert to fraction form
    1,030.62/1,422.15 = 611.01/x
  3. Step 3: Cross multiply
    1,030.62x = 1,422.15 × 611.01
  4. Step 4: Simplify right side
    1,030.62x = 868,947.87
  5. Step 5: Solve for x
    x = 868,947.87/1,030.62
  6. Step 6: Final answer
    x = 843.13

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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.