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Finding the Fourth Proportional to 1,589.85, 2,383.13 and 857.88

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Solution

The fourth proportional to 1,589.85, 2,383.13 and 857.88 is: 1,285.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,589.85 : 2,383.13 = 857.88 : x
  2. Step 2: Convert to fraction form
    1,589.85/2,383.13 = 857.88/x
  3. Step 3: Cross multiply
    1,589.85x = 2,383.13 × 857.88
  4. Step 4: Simplify right side
    1,589.85x = 2,044,441.71
  5. Step 5: Solve for x
    x = 2,044,441.71/1,589.85
  6. Step 6: Final answer
    x = 1,285.93

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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.