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Finding the Fourth Proportional to 487.83, 673.28 and 291.45

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Solution

The fourth proportional to 487.83, 673.28 and 291.45 is: 402.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.83 : 673.28 = 291.45 : x
  2. Step 2: Convert to fraction form
    487.83/673.28 = 291.45/x
  3. Step 3: Cross multiply
    487.83x = 673.28 × 291.45
  4. Step 4: Simplify right side
    487.83x = 196,227.46
  5. Step 5: Solve for x
    x = 196,227.46/487.83
  6. Step 6: Final answer
    x = 402.25

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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.