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Finding the Fourth Proportional to 859.97, 1,290.06 and 282.85

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Solution

The fourth proportional to 859.97, 1,290.06 and 282.85 is: 424.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.97 : 1,290.06 = 282.85 : x
  2. Step 2: Convert to fraction form
    859.97/1,290.06 = 282.85/x
  3. Step 3: Cross multiply
    859.97x = 1,290.06 × 282.85
  4. Step 4: Simplify right side
    859.97x = 364,890.25
  5. Step 5: Solve for x
    x = 364,890.25/859.97
  6. Step 6: Final answer
    x = 424.30

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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.