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Finding the Fourth Proportional to 598.40, 825.18 and 388.67

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Solution

The fourth proportional to 598.40, 825.18 and 388.67 is: 535.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    598.40 : 825.18 = 388.67 : x
  2. Step 2: Convert to fraction form
    598.40/825.18 = 388.67/x
  3. Step 3: Cross multiply
    598.40x = 825.18 × 388.67
  4. Step 4: Simplify right side
    598.40x = 320,722.71
  5. Step 5: Solve for x
    x = 320,722.71/598.40
  6. Step 6: Final answer
    x = 535.97

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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.