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Finding the Fourth Proportional to 476.28, 657.16 and 279.84

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Solution

The fourth proportional to 476.28, 657.16 and 279.84 is: 386.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.28 : 657.16 = 279.84 : x
  2. Step 2: Convert to fraction form
    476.28/657.16 = 279.84/x
  3. Step 3: Cross multiply
    476.28x = 657.16 × 279.84
  4. Step 4: Simplify right side
    476.28x = 183,899.65
  5. Step 5: Solve for x
    x = 183,899.65/476.28
  6. Step 6: Final answer
    x = 386.12

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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.