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Finding the Fourth Proportional to 3,048.31, 4,572.05 and 857.23

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Solution

The fourth proportional to 3,048.31, 4,572.05 and 857.23 is: 1,285.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,048.31 : 4,572.05 = 857.23 : x
  2. Step 2: Convert to fraction form
    3,048.31/4,572.05 = 857.23/x
  3. Step 3: Cross multiply
    3,048.31x = 4,572.05 × 857.23
  4. Step 4: Simplify right side
    3,048.31x = 3,919,289.13
  5. Step 5: Solve for x
    x = 3,919,289.13/3,048.31
  6. Step 6: Final answer
    x = 1,285.73

Related Problems

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Double scale
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Similar ratio
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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.