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Finding the Fourth Proportional to 477.90, 659.62 and 281.47

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Solution

The fourth proportional to 477.90, 659.62 and 281.47 is: 388.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.90 : 659.62 = 281.47 : x
  2. Step 2: Convert to fraction form
    477.90/659.62 = 281.47/x
  3. Step 3: Cross multiply
    477.90x = 659.62 × 281.47
  4. Step 4: Simplify right side
    477.90x = 185,663.24
  5. Step 5: Solve for x
    x = 185,663.24/477.90
  6. Step 6: Final answer
    x = 388.50

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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.