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Finding the Fourth Proportional to 354.37, 489.01 and 207.08

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Solution

The fourth proportional to 354.37, 489.01 and 207.08 is: 285.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.37 : 489.01 = 207.08 : x
  2. Step 2: Convert to fraction form
    354.37/489.01 = 207.08/x
  3. Step 3: Cross multiply
    354.37x = 489.01 × 207.08
  4. Step 4: Simplify right side
    354.37x = 101,264.19
  5. Step 5: Solve for x
    x = 101,264.19/354.37
  6. Step 6: Final answer
    x = 285.76

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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.