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Finding the Fourth Proportional to 504.74, 694.54 and 489.70

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Solution

The fourth proportional to 504.74, 694.54 and 489.70 is: 673.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.74 : 694.54 = 489.70 : x
  2. Step 2: Convert to fraction form
    504.74/694.54 = 489.70/x
  3. Step 3: Cross multiply
    504.74x = 694.54 × 489.70
  4. Step 4: Simplify right side
    504.74x = 340,116.24
  5. Step 5: Solve for x
    x = 340,116.24/504.74
  6. Step 6: Final answer
    x = 673.84

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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.