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Finding the Fourth Proportional to 266.90, 368.42 and 207.77

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Solution

The fourth proportional to 266.90, 368.42 and 207.77 is: 286.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.90 : 368.42 = 207.77 : x
  2. Step 2: Convert to fraction form
    266.90/368.42 = 207.77/x
  3. Step 3: Cross multiply
    266.90x = 368.42 × 207.77
  4. Step 4: Simplify right side
    266.90x = 76,543.74
  5. Step 5: Solve for x
    x = 76,543.74/266.90
  6. Step 6: Final answer
    x = 286.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.