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Finding the Fourth Proportional to 452.81, 677.59 and 392.15

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Solution

The fourth proportional to 452.81, 677.59 and 392.15 is: 586.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.81 : 677.59 = 392.15 : x
  2. Step 2: Convert to fraction form
    452.81/677.59 = 392.15/x
  3. Step 3: Cross multiply
    452.81x = 677.59 × 392.15
  4. Step 4: Simplify right side
    452.81x = 265,712.55
  5. Step 5: Solve for x
    x = 265,712.55/452.81
  6. Step 6: Final answer
    x = 586.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.