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Finding the Fourth Proportional to 487.68, 673.36 and 313.12

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Solution

The fourth proportional to 487.68, 673.36 and 313.12 is: 432.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.68 : 673.36 = 313.12 : x
  2. Step 2: Convert to fraction form
    487.68/673.36 = 313.12/x
  3. Step 3: Cross multiply
    487.68x = 673.36 × 313.12
  4. Step 4: Simplify right side
    487.68x = 210,842.48
  5. Step 5: Solve for x
    x = 210,842.48/487.68
  6. Step 6: Final answer
    x = 432.34

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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.