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Finding the Fourth Proportional to 2,572.70, 3,857.42 and 928.94

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Solution

The fourth proportional to 2,572.70, 3,857.42 and 928.94 is: 1,392.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,572.70 : 3,857.42 = 928.94 : x
  2. Step 2: Convert to fraction form
    2,572.70/3,857.42 = 928.94/x
  3. Step 3: Cross multiply
    2,572.70x = 3,857.42 × 928.94
  4. Step 4: Simplify right side
    2,572.70x = 3,583,294.77
  5. Step 5: Solve for x
    x = 3,583,294.77/2,572.70
  6. Step 6: Final answer
    x = 1,392.82

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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.