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Finding the Fourth Proportional to 3,048.86, 4,572.58 and 857.80

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Solution

The fourth proportional to 3,048.86, 4,572.58 and 857.80 is: 1,286.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,048.86 : 4,572.58 = 857.80 : x
  2. Step 2: Convert to fraction form
    3,048.86/4,572.58 = 857.80/x
  3. Step 3: Cross multiply
    3,048.86x = 4,572.58 × 857.80
  4. Step 4: Simplify right side
    3,048.86x = 3,922,359.12
  5. Step 5: Solve for x
    x = 3,922,359.12/3,048.86
  6. Step 6: Final answer
    x = 1,286.50

Related Problems

Find fourth proportional to 1,524.43, 2,286.29 and 428.90
Half scale
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Double scale
Find fourth proportional to 3,049.86, 4,574.08 and 858.80
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.