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Finding the Fourth Proportional to 557.40, 836.06 and 172.64

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Solution

The fourth proportional to 557.40, 836.06 and 172.64 is: 258.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.40 : 836.06 = 172.64 : x
  2. Step 2: Convert to fraction form
    557.40/836.06 = 172.64/x
  3. Step 3: Cross multiply
    557.40x = 836.06 × 172.64
  4. Step 4: Simplify right side
    557.40x = 144,337.40
  5. Step 5: Solve for x
    x = 144,337.40/557.40
  6. Step 6: Final answer
    x = 258.95

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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.