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Finding the Fourth Proportional to 277.40, 416.10 and 253.91

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Solution

The fourth proportional to 277.40, 416.10 and 253.91 is: 380.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.40 : 416.10 = 253.91 : x
  2. Step 2: Convert to fraction form
    277.40/416.10 = 253.91/x
  3. Step 3: Cross multiply
    277.40x = 416.10 × 253.91
  4. Step 4: Simplify right side
    277.40x = 105,649.87
  5. Step 5: Solve for x
    x = 105,649.87/277.40
  6. Step 6: Final answer
    x = 380.86

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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.