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Finding the Fourth Proportional to 479.37, 661.35 and 282.87

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Solution

The fourth proportional to 479.37, 661.35 and 282.87 is: 390.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.37 : 661.35 = 282.87 : x
  2. Step 2: Convert to fraction form
    479.37/661.35 = 282.87/x
  3. Step 3: Cross multiply
    479.37x = 661.35 × 282.87
  4. Step 4: Simplify right side
    479.37x = 187,076.07
  5. Step 5: Solve for x
    x = 187,076.07/479.37
  6. Step 6: Final answer
    x = 390.25

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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.