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Finding the Fourth Proportional to 659.55, 910.19 and 379.88

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Solution

The fourth proportional to 659.55, 910.19 and 379.88 is: 524.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.55 : 910.19 = 379.88 : x
  2. Step 2: Convert to fraction form
    659.55/910.19 = 379.88/x
  3. Step 3: Cross multiply
    659.55x = 910.19 × 379.88
  4. Step 4: Simplify right side
    659.55x = 345,762.98
  5. Step 5: Solve for x
    x = 345,762.98/659.55
  6. Step 6: Final answer
    x = 524.24

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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.