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Finding the Fourth Proportional to 1,154.86, 1,730.94 and 423.58

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Solution

The fourth proportional to 1,154.86, 1,730.94 and 423.58 is: 634.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,154.86 : 1,730.94 = 423.58 : x
  2. Step 2: Convert to fraction form
    1,154.86/1,730.94 = 423.58/x
  3. Step 3: Cross multiply
    1,154.86x = 1,730.94 × 423.58
  4. Step 4: Simplify right side
    1,154.86x = 733,191.57
  5. Step 5: Solve for x
    x = 733,191.57/1,154.86
  6. Step 6: Final answer
    x = 634.87

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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.