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Finding the Fourth Proportional to 487.96, 673.60 and 313.56

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Solution

The fourth proportional to 487.96, 673.60 and 313.56 is: 432.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.96 : 673.60 = 313.56 : x
  2. Step 2: Convert to fraction form
    487.96/673.60 = 313.56/x
  3. Step 3: Cross multiply
    487.96x = 673.60 × 313.56
  4. Step 4: Simplify right side
    487.96x = 211,214.02
  5. Step 5: Solve for x
    x = 211,214.02/487.96
  6. Step 6: Final answer
    x = 432.85

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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.