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Finding the Fourth Proportional to 491.93, 678.85 and 270.86

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Solution

The fourth proportional to 491.93, 678.85 and 270.86 is: 373.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.93 : 678.85 = 270.86 : x
  2. Step 2: Convert to fraction form
    491.93/678.85 = 270.86/x
  3. Step 3: Cross multiply
    491.93x = 678.85 × 270.86
  4. Step 4: Simplify right side
    491.93x = 183,868.56
  5. Step 5: Solve for x
    x = 183,868.56/491.93
  6. Step 6: Final answer
    x = 373.77

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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.