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Finding the Fourth Proportional to 557.42, 836.13 and 172.64

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Solution

The fourth proportional to 557.42, 836.13 and 172.64 is: 258.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.42 : 836.13 = 172.64 : x
  2. Step 2: Convert to fraction form
    557.42/836.13 = 172.64/x
  3. Step 3: Cross multiply
    557.42x = 836.13 × 172.64
  4. Step 4: Simplify right side
    557.42x = 144,349.48
  5. Step 5: Solve for x
    x = 144,349.48/557.42
  6. Step 6: Final answer
    x = 258.96

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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.