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Finding the Fourth Proportional to 489.34, 730.45 and 479.62

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Solution

The fourth proportional to 489.34, 730.45 and 479.62 is: 715.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.34 : 730.45 = 479.62 : x
  2. Step 2: Convert to fraction form
    489.34/730.45 = 479.62/x
  3. Step 3: Cross multiply
    489.34x = 730.45 × 479.62
  4. Step 4: Simplify right side
    489.34x = 350,338.43
  5. Step 5: Solve for x
    x = 350,338.43/489.34
  6. Step 6: Final answer
    x = 715.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.