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Finding the Fourth Proportional to 314.90, 432.80 and 277.83

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Solution

The fourth proportional to 314.90, 432.80 and 277.83 is: 381.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.90 : 432.80 = 277.83 : x
  2. Step 2: Convert to fraction form
    314.90/432.80 = 277.83/x
  3. Step 3: Cross multiply
    314.90x = 432.80 × 277.83
  4. Step 4: Simplify right side
    314.90x = 120,243.43
  5. Step 5: Solve for x
    x = 120,243.43/314.90
  6. Step 6: Final answer
    x = 381.85

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.