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Finding the Fourth Proportional to 1,803.19, 2,705 and 570.42

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Solution

The fourth proportional to 1,803.19, 2,705 and 570.42 is: 855.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,803.19 : 2,705 = 570.42 : x
  2. Step 2: Convert to fraction form
    1,803.19/2,705 = 570.42/x
  3. Step 3: Cross multiply
    1,803.19x = 2,705 × 570.42
  4. Step 4: Simplify right side
    1,803.19x = 1,542,986.10
  5. Step 5: Solve for x
    x = 1,542,986.10/1,803.19
  6. Step 6: Final answer
    x = 855.70

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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.