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Finding the Fourth Proportional to 284.97, 390.71 and 279.51

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Solution

The fourth proportional to 284.97, 390.71 and 279.51 is: 383.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.97 : 390.71 = 279.51 : x
  2. Step 2: Convert to fraction form
    284.97/390.71 = 279.51/x
  3. Step 3: Cross multiply
    284.97x = 390.71 × 279.51
  4. Step 4: Simplify right side
    284.97x = 109,207.35
  5. Step 5: Solve for x
    x = 109,207.35/284.97
  6. Step 6: Final answer
    x = 383.22

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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.