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Finding the Fourth Proportional to 598.50, 896.40 and 320.40

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Solution

The fourth proportional to 598.50, 896.40 and 320.40 is: 479.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    598.50 : 896.40 = 320.40 : x
  2. Step 2: Convert to fraction form
    598.50/896.40 = 320.40/x
  3. Step 3: Cross multiply
    598.50x = 896.40 × 320.40
  4. Step 4: Simplify right side
    598.50x = 287,206.56
  5. Step 5: Solve for x
    x = 287,206.56/598.50
  6. Step 6: Final answer
    x = 479.88

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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.