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Finding the Fourth Proportional to 855.09, 1,281.33 and 565.92

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Solution

The fourth proportional to 855.09, 1,281.33 and 565.92 is: 848.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.09 : 1,281.33 = 565.92 : x
  2. Step 2: Convert to fraction form
    855.09/1,281.33 = 565.92/x
  3. Step 3: Cross multiply
    855.09x = 1,281.33 × 565.92
  4. Step 4: Simplify right side
    855.09x = 725,130.27
  5. Step 5: Solve for x
    x = 725,130.27/855.09
  6. Step 6: Final answer
    x = 848.02

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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.