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Finding the Fourth Proportional to 266.58, 397.76 and 265.05

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Solution

The fourth proportional to 266.58, 397.76 and 265.05 is: 395.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.58 : 397.76 = 265.05 : x
  2. Step 2: Convert to fraction form
    266.58/397.76 = 265.05/x
  3. Step 3: Cross multiply
    266.58x = 397.76 × 265.05
  4. Step 4: Simplify right side
    266.58x = 105,424.96
  5. Step 5: Solve for x
    x = 105,424.96/266.58
  6. Step 6: Final answer
    x = 395.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.