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Finding the Fourth Proportional to 469.12, 703.60 and 172.57

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Solution

The fourth proportional to 469.12, 703.60 and 172.57 is: 258.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.12 : 703.60 = 172.57 : x
  2. Step 2: Convert to fraction form
    469.12/703.60 = 172.57/x
  3. Step 3: Cross multiply
    469.12x = 703.60 × 172.57
  4. Step 4: Simplify right side
    469.12x = 121,419.38
  5. Step 5: Solve for x
    x = 121,419.38/469.12
  6. Step 6: Final answer
    x = 258.82

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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.