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Finding the Fourth Proportional to 282.02, 388.54 and 207.19

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Solution

The fourth proportional to 282.02, 388.54 and 207.19 is: 285.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.02 : 388.54 = 207.19 : x
  2. Step 2: Convert to fraction form
    282.02/388.54 = 207.19/x
  3. Step 3: Cross multiply
    282.02x = 388.54 × 207.19
  4. Step 4: Simplify right side
    282.02x = 80,502.35
  5. Step 5: Solve for x
    x = 80,502.35/282.02
  6. Step 6: Final answer
    x = 285.45

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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.