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Finding the Fourth Proportional to 479.68, 661.98 and 376

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Solution

The fourth proportional to 479.68, 661.98 and 376 is: 518.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.68 : 661.98 = 376 : x
  2. Step 2: Convert to fraction form
    479.68/661.98 = 376/x
  3. Step 3: Cross multiply
    479.68x = 661.98 × 376
  4. Step 4: Simplify right side
    479.68x = 248,904.48
  5. Step 5: Solve for x
    x = 248,904.48/479.68
  6. Step 6: Final answer
    x = 518.90

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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.