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Finding the Fourth Proportional to 476, 656.91 and 279.47

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Solution

The fourth proportional to 476, 656.91 and 279.47 is: 385.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    476 : 656.91 = 279.47 : x
  2. Step 2: Convert to fraction form
    476/656.91 = 279.47/x
  3. Step 3: Cross multiply
    476x = 656.91 × 279.47
  4. Step 4: Simplify right side
    476x = 183,586.64
  5. Step 5: Solve for x
    x = 183,586.64/476
  6. Step 6: Final answer
    x = 385.69

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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.