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Finding the Fourth Proportional to 497.05, 745.80 and 172.65

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Solution

The fourth proportional to 497.05, 745.80 and 172.65 is: 259.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.05 : 745.80 = 172.65 : x
  2. Step 2: Convert to fraction form
    497.05/745.80 = 172.65/x
  3. Step 3: Cross multiply
    497.05x = 745.80 × 172.65
  4. Step 4: Simplify right side
    497.05x = 128,761.51
  5. Step 5: Solve for x
    x = 128,761.51/497.05
  6. Step 6: Final answer
    x = 259.05

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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.