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Finding the Fourth Proportional to 1,726.58, 2,590.79 and 631.26

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Solution

The fourth proportional to 1,726.58, 2,590.79 and 631.26 is: 947.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,726.58 : 2,590.79 = 631.26 : x
  2. Step 2: Convert to fraction form
    1,726.58/2,590.79 = 631.26/x
  3. Step 3: Cross multiply
    1,726.58x = 2,590.79 × 631.26
  4. Step 4: Simplify right side
    1,726.58x = 1,635,458.94
  5. Step 5: Solve for x
    x = 1,635,458.94/1,726.58
  6. Step 6: Final answer
    x = 947.22

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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.