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Finding the Fourth Proportional to 726.77, 1,090.34 and 288.05

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Solution

The fourth proportional to 726.77, 1,090.34 and 288.05 is: 432.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.77 : 1,090.34 = 288.05 : x
  2. Step 2: Convert to fraction form
    726.77/1,090.34 = 288.05/x
  3. Step 3: Cross multiply
    726.77x = 1,090.34 × 288.05
  4. Step 4: Simplify right side
    726.77x = 314,072.44
  5. Step 5: Solve for x
    x = 314,072.44/726.77
  6. Step 6: Final answer
    x = 432.15

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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.