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Finding the Fourth Proportional to 479.61, 661.15 and 374.47

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Solution

The fourth proportional to 479.61, 661.15 and 374.47 is: 516.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.61 : 661.15 = 374.47 : x
  2. Step 2: Convert to fraction form
    479.61/661.15 = 374.47/x
  3. Step 3: Cross multiply
    479.61x = 661.15 × 374.47
  4. Step 4: Simplify right side
    479.61x = 247,580.84
  5. Step 5: Solve for x
    x = 247,580.84/479.61
  6. Step 6: Final answer
    x = 516.21

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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.