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Finding the Fourth Proportional to 855.90, 1,282.32 and 444.42

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Solution

The fourth proportional to 855.90, 1,282.32 and 444.42 is: 665.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.90 : 1,282.32 = 444.42 : x
  2. Step 2: Convert to fraction form
    855.90/1,282.32 = 444.42/x
  3. Step 3: Cross multiply
    855.90x = 1,282.32 × 444.42
  4. Step 4: Simplify right side
    855.90x = 569,888.65
  5. Step 5: Solve for x
    x = 569,888.65/855.90
  6. Step 6: Final answer
    x = 665.84

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1.5x scale

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.