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Finding the Fourth Proportional to 284.79, 392.55 and 201.79

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Solution

The fourth proportional to 284.79, 392.55 and 201.79 is: 278.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.79 : 392.55 = 201.79 : x
  2. Step 2: Convert to fraction form
    284.79/392.55 = 201.79/x
  3. Step 3: Cross multiply
    284.79x = 392.55 × 201.79
  4. Step 4: Simplify right side
    284.79x = 79,212.66
  5. Step 5: Solve for x
    x = 79,212.66/284.79
  6. Step 6: Final answer
    x = 278.14

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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.