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Finding the Fourth Proportional to 659.55, 910.35 and 423.66

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Solution

The fourth proportional to 659.55, 910.35 and 423.66 is: 584.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.55 : 910.35 = 423.66 : x
  2. Step 2: Convert to fraction form
    659.55/910.35 = 423.66/x
  3. Step 3: Cross multiply
    659.55x = 910.35 × 423.66
  4. Step 4: Simplify right side
    659.55x = 385,678.88
  5. Step 5: Solve for x
    x = 385,678.88/659.55
  6. Step 6: Final answer
    x = 584.76

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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.