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Finding the Fourth Proportional to 1,366.80, 2,050.50 and 545.10

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Solution

The fourth proportional to 1,366.80, 2,050.50 and 545.10 is: 817.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.80 : 2,050.50 = 545.10 : x
  2. Step 2: Convert to fraction form
    1,366.80/2,050.50 = 545.10/x
  3. Step 3: Cross multiply
    1,366.80x = 2,050.50 × 545.10
  4. Step 4: Simplify right side
    1,366.80x = 1,117,727.55
  5. Step 5: Solve for x
    x = 1,117,727.55/1,366.80
  6. Step 6: Final answer
    x = 817.77

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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.