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Finding the Fourth Proportional to 489.05, 730.13 and 372.87

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Solution

The fourth proportional to 489.05, 730.13 and 372.87 is: 556.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.05 : 730.13 = 372.87 : x
  2. Step 2: Convert to fraction form
    489.05/730.13 = 372.87/x
  3. Step 3: Cross multiply
    489.05x = 730.13 × 372.87
  4. Step 4: Simplify right side
    489.05x = 272,244.51
  5. Step 5: Solve for x
    x = 272,244.51/489.05
  6. Step 6: Final answer
    x = 556.69

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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.