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Finding the Fourth Proportional to 314.78, 434.45 and 183.83

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Solution

The fourth proportional to 314.78, 434.45 and 183.83 is: 253.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.78 : 434.45 = 183.83 : x
  2. Step 2: Convert to fraction form
    314.78/434.45 = 183.83/x
  3. Step 3: Cross multiply
    314.78x = 434.45 × 183.83
  4. Step 4: Simplify right side
    314.78x = 79,866.49
  5. Step 5: Solve for x
    x = 79,866.49/314.78
  6. Step 6: Final answer
    x = 253.72

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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.