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Finding the Fourth Proportional to 487.95, 673.37 and 291.46

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Solution

The fourth proportional to 487.95, 673.37 and 291.46 is: 402.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.95 : 673.37 = 291.46 : x
  2. Step 2: Convert to fraction form
    487.95/673.37 = 291.46/x
  3. Step 3: Cross multiply
    487.95x = 673.37 × 291.46
  4. Step 4: Simplify right side
    487.95x = 196,260.42
  5. Step 5: Solve for x
    x = 196,260.42/487.95
  6. Step 6: Final answer
    x = 402.21

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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.