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Finding the Fourth Proportional to 440, 607.22 and 284.84

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Solution

The fourth proportional to 440, 607.22 and 284.84 is: 393.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    440 : 607.22 = 284.84 : x
  2. Step 2: Convert to fraction form
    440/607.22 = 284.84/x
  3. Step 3: Cross multiply
    440x = 607.22 × 284.84
  4. Step 4: Simplify right side
    440x = 172,960.54
  5. Step 5: Solve for x
    x = 172,960.54/440
  6. Step 6: Final answer
    x = 393.09

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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.