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Finding the Fourth Proportional to 476.60, 657.46 and 279.99

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Solution

The fourth proportional to 476.60, 657.46 and 279.99 is: 386.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.60 : 657.46 = 279.99 : x
  2. Step 2: Convert to fraction form
    476.60/657.46 = 279.99/x
  3. Step 3: Cross multiply
    476.60x = 657.46 × 279.99
  4. Step 4: Simplify right side
    476.60x = 184,082.58
  5. Step 5: Solve for x
    x = 184,082.58/476.60
  6. Step 6: Final answer
    x = 386.25

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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.