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Finding the Fourth Proportional to 500.08, 689.96 and 313.60

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Solution

The fourth proportional to 500.08, 689.96 and 313.60 is: 432.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.08 : 689.96 = 313.60 : x
  2. Step 2: Convert to fraction form
    500.08/689.96 = 313.60/x
  3. Step 3: Cross multiply
    500.08x = 689.96 × 313.60
  4. Step 4: Simplify right side
    500.08x = 216,371.46
  5. Step 5: Solve for x
    x = 216,371.46/500.08
  6. Step 6: Final answer
    x = 432.67

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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.