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Finding the Fourth Proportional to 1,640.46, 2,460.80 and 545.58

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Solution

The fourth proportional to 1,640.46, 2,460.80 and 545.58 is: 818.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.46 : 2,460.80 = 545.58 : x
  2. Step 2: Convert to fraction form
    1,640.46/2,460.80 = 545.58/x
  3. Step 3: Cross multiply
    1,640.46x = 2,460.80 × 545.58
  4. Step 4: Simplify right side
    1,640.46x = 1,342,560.54
  5. Step 5: Solve for x
    x = 1,342,560.54/1,640.46
  6. Step 6: Final answer
    x = 818.40

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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.