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Finding the Fourth Proportional to 504.18, 693.83 and 489.91

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Solution

The fourth proportional to 504.18, 693.83 and 489.91 is: 674.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.18 : 693.83 = 489.91 : x
  2. Step 2: Convert to fraction form
    504.18/693.83 = 489.91/x
  3. Step 3: Cross multiply
    504.18x = 693.83 × 489.91
  4. Step 4: Simplify right side
    504.18x = 339,908.34
  5. Step 5: Solve for x
    x = 339,908.34/504.18
  6. Step 6: Final answer
    x = 674.18

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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.