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Finding the Fourth Proportional to 284.12, 392.18 and 190.81

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Solution

The fourth proportional to 284.12, 392.18 and 190.81 is: 263.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.12 : 392.18 = 190.81 : x
  2. Step 2: Convert to fraction form
    284.12/392.18 = 190.81/x
  3. Step 3: Cross multiply
    284.12x = 392.18 × 190.81
  4. Step 4: Simplify right side
    284.12x = 74,831.87
  5. Step 5: Solve for x
    x = 74,831.87/284.12
  6. Step 6: Final answer
    x = 263.38

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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.