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Finding the Fourth Proportional to 659.87, 910.56 and 380.06

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Solution

The fourth proportional to 659.87, 910.56 and 380.06 is: 524.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.87 : 910.56 = 380.06 : x
  2. Step 2: Convert to fraction form
    659.87/910.56 = 380.06/x
  3. Step 3: Cross multiply
    659.87x = 910.56 × 380.06
  4. Step 4: Simplify right side
    659.87x = 346,067.43
  5. Step 5: Solve for x
    x = 346,067.43/659.87
  6. Step 6: Final answer
    x = 524.45

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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.