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Finding the Fourth Proportional to 478.03, 659.69 and 281.55

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Solution

The fourth proportional to 478.03, 659.69 and 281.55 is: 388.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.03 : 659.69 = 281.55 : x
  2. Step 2: Convert to fraction form
    478.03/659.69 = 281.55/x
  3. Step 3: Cross multiply
    478.03x = 659.69 × 281.55
  4. Step 4: Simplify right side
    478.03x = 185,731.01
  5. Step 5: Solve for x
    x = 185,731.01/478.03
  6. Step 6: Final answer
    x = 388.53

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.