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Finding the Fourth Proportional to 1,640.56, 2,461.20 and 545.08

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Solution

The fourth proportional to 1,640.56, 2,461.20 and 545.08 is: 817.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.56 : 2,461.20 = 545.08 : x
  2. Step 2: Convert to fraction form
    1,640.56/2,461.20 = 545.08/x
  3. Step 3: Cross multiply
    1,640.56x = 2,461.20 × 545.08
  4. Step 4: Simplify right side
    1,640.56x = 1,341,550.90
  5. Step 5: Solve for x
    x = 1,341,550.90/1,640.56
  6. Step 6: Final answer
    x = 817.74

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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.