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Finding the Fourth Proportional to 487.05, 727.03 and 425.55

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Solution

The fourth proportional to 487.05, 727.03 and 425.55 is: 635.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.05 : 727.03 = 425.55 : x
  2. Step 2: Convert to fraction form
    487.05/727.03 = 425.55/x
  3. Step 3: Cross multiply
    487.05x = 727.03 × 425.55
  4. Step 4: Simplify right side
    487.05x = 309,384.14
  5. Step 5: Solve for x
    x = 309,384.14/487.05
  6. Step 6: Final answer
    x = 635.21

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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.