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Finding the Fourth Proportional to 500.76, 690.75 and 323.64

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Solution

The fourth proportional to 500.76, 690.75 and 323.64 is: 446.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.76 : 690.75 = 323.64 : x
  2. Step 2: Convert to fraction form
    500.76/690.75 = 323.64/x
  3. Step 3: Cross multiply
    500.76x = 690.75 × 323.64
  4. Step 4: Simplify right side
    500.76x = 223,554.33
  5. Step 5: Solve for x
    x = 223,554.33/500.76
  6. Step 6: Final answer
    x = 446.43

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Find fourth proportional to 250.38, 345.38 and 161.82
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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.