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Finding the Fourth Proportional to 500.09, 689.92 and 313.52

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Solution

The fourth proportional to 500.09, 689.92 and 313.52 is: 432.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.09 : 689.92 = 313.52 : x
  2. Step 2: Convert to fraction form
    500.09/689.92 = 313.52/x
  3. Step 3: Cross multiply
    500.09x = 689.92 × 313.52
  4. Step 4: Simplify right side
    500.09x = 216,299.49
  5. Step 5: Solve for x
    x = 216,299.49/500.09
  6. Step 6: Final answer
    x = 432.53

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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.