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Finding the Fourth Proportional to 487.40, 727.58 and 414.48

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Solution

The fourth proportional to 487.40, 727.58 and 414.48 is: 618.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.40 : 727.58 = 414.48 : x
  2. Step 2: Convert to fraction form
    487.40/727.58 = 414.48/x
  3. Step 3: Cross multiply
    487.40x = 727.58 × 414.48
  4. Step 4: Simplify right side
    487.40x = 301,567.36
  5. Step 5: Solve for x
    x = 301,567.36/487.40
  6. Step 6: Final answer
    x = 618.73

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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.