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Finding the Fourth Proportional to 314.51, 433.80 and 284.81

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Solution

The fourth proportional to 314.51, 433.80 and 284.81 is: 392.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.51 : 433.80 = 284.81 : x
  2. Step 2: Convert to fraction form
    314.51/433.80 = 284.81/x
  3. Step 3: Cross multiply
    314.51x = 433.80 × 284.81
  4. Step 4: Simplify right side
    314.51x = 123,548.41
  5. Step 5: Solve for x
    x = 123,548.41/314.51
  6. Step 6: Final answer
    x = 392.83

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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.