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Finding the Fourth Proportional to 425.42, 634.99 and 395.39

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Solution

The fourth proportional to 425.42, 634.99 and 395.39 is: 590.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.42 : 634.99 = 395.39 : x
  2. Step 2: Convert to fraction form
    425.42/634.99 = 395.39/x
  3. Step 3: Cross multiply
    425.42x = 634.99 × 395.39
  4. Step 4: Simplify right side
    425.42x = 251,068.70
  5. Step 5: Solve for x
    x = 251,068.70/425.42
  6. Step 6: Final answer
    x = 590.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.