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Finding the Fourth Proportional to 500.19, 689.88 and 323.03

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Solution

The fourth proportional to 500.19, 689.88 and 323.03 is: 445.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.19 : 689.88 = 323.03 : x
  2. Step 2: Convert to fraction form
    500.19/689.88 = 323.03/x
  3. Step 3: Cross multiply
    500.19x = 689.88 × 323.03
  4. Step 4: Simplify right side
    500.19x = 222,848.49
  5. Step 5: Solve for x
    x = 222,848.49/500.19
  6. Step 6: Final answer
    x = 445.53

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1.5x scale

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.