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Finding the Fourth Proportional to 684.59, 1,025.58 and 452.80

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Solution

The fourth proportional to 684.59, 1,025.58 and 452.80 is: 678.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.59 : 1,025.58 = 452.80 : x
  2. Step 2: Convert to fraction form
    684.59/1,025.58 = 452.80/x
  3. Step 3: Cross multiply
    684.59x = 1,025.58 × 452.80
  4. Step 4: Simplify right side
    684.59x = 464,377.29
  5. Step 5: Solve for x
    x = 464,377.29/684.59
  6. Step 6: Final answer
    x = 678.33

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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.