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Finding the Fourth Proportional to 489.30, 673.70 and 415.46

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Solution

The fourth proportional to 489.30, 673.70 and 415.46 is: 572.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.30 : 673.70 = 415.46 : x
  2. Step 2: Convert to fraction form
    489.30/673.70 = 415.46/x
  3. Step 3: Cross multiply
    489.30x = 673.70 × 415.46
  4. Step 4: Simplify right side
    489.30x = 279,895.40
  5. Step 5: Solve for x
    x = 279,895.40/489.30
  6. Step 6: Final answer
    x = 572.03

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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.