Home / 1,285.47-1,928.68-545.27

Finding the Fourth Proportional to 1,285.47, 1,928.68 and 545.27

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Solution

The fourth proportional to 1,285.47, 1,928.68 and 545.27 is: 818.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.47 : 1,928.68 = 545.27 : x
  2. Step 2: Convert to fraction form
    1,285.47/1,928.68 = 545.27/x
  3. Step 3: Cross multiply
    1,285.47x = 1,928.68 × 545.27
  4. Step 4: Simplify right side
    1,285.47x = 1,051,651.34
  5. Step 5: Solve for x
    x = 1,051,651.34/1,285.47
  6. Step 6: Final answer
    x = 818.11

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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.