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Finding the Fourth Proportional to 726.06, 1,089.40 and 401.05

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Solution

The fourth proportional to 726.06, 1,089.40 and 401.05 is: 601.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.06 : 1,089.40 = 401.05 : x
  2. Step 2: Convert to fraction form
    726.06/1,089.40 = 401.05/x
  3. Step 3: Cross multiply
    726.06x = 1,089.40 × 401.05
  4. Step 4: Simplify right side
    726.06x = 436,904.98
  5. Step 5: Solve for x
    x = 436,904.98/726.06
  6. Step 6: Final answer
    x = 601.74

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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.