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Finding the Fourth Proportional to 1,726.88, 2,589.78 and 631.00

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Solution

The fourth proportional to 1,726.88, 2,589.78 and 631.00 is: 946.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,726.88 : 2,589.78 = 631.00 : x
  2. Step 2: Convert to fraction form
    1,726.88/2,589.78 = 631.00/x
  3. Step 3: Cross multiply
    1,726.88x = 2,589.78 × 631.00
  4. Step 4: Simplify right side
    1,726.88x = 1,634,138.23
  5. Step 5: Solve for x
    x = 1,634,138.23/1,726.88
  6. Step 6: Final answer
    x = 946.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.