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Finding the Fourth Proportional to 598.90, 898.99 and 425.90

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Solution

The fourth proportional to 598.90, 898.99 and 425.90 is: 639.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    598.90 : 898.99 = 425.90 : x
  2. Step 2: Convert to fraction form
    598.90/898.99 = 425.90/x
  3. Step 3: Cross multiply
    598.90x = 898.99 × 425.90
  4. Step 4: Simplify right side
    598.90x = 382,879.84
  5. Step 5: Solve for x
    x = 382,879.84/598.90
  6. Step 6: Final answer
    x = 639.31

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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.