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Finding the Fourth Proportional to 497.32, 745.70 and 172.58

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Solution

The fourth proportional to 497.32, 745.70 and 172.58 is: 258.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.32 : 745.70 = 172.58 : x
  2. Step 2: Convert to fraction form
    497.32/745.70 = 172.58/x
  3. Step 3: Cross multiply
    497.32x = 745.70 × 172.58
  4. Step 4: Simplify right side
    497.32x = 128,692.91
  5. Step 5: Solve for x
    x = 128,692.91/497.32
  6. Step 6: Final answer
    x = 258.77

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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.