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Finding the Fourth Proportional to 723.54, 1,085.30 and 175.72

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Solution

The fourth proportional to 723.54, 1,085.30 and 175.72 is: 263.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.54 : 1,085.30 = 175.72 : x
  2. Step 2: Convert to fraction form
    723.54/1,085.30 = 175.72/x
  3. Step 3: Cross multiply
    723.54x = 1,085.30 × 175.72
  4. Step 4: Simplify right side
    723.54x = 190,710.71
  5. Step 5: Solve for x
    x = 190,710.71/723.54
  6. Step 6: Final answer
    x = 263.58

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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.