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Finding the Fourth Proportional to 606.95, 910.90 and 423.15

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Solution

The fourth proportional to 606.95, 910.90 and 423.15 is: 635.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.95 : 910.90 = 423.15 : x
  2. Step 2: Convert to fraction form
    606.95/910.90 = 423.15/x
  3. Step 3: Cross multiply
    606.95x = 910.90 × 423.15
  4. Step 4: Simplify right side
    606.95x = 385,447.86
  5. Step 5: Solve for x
    x = 385,447.86/606.95
  6. Step 6: Final answer
    x = 635.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.