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Finding the Fourth Proportional to 3,313.56, 4,572.78 and 1,821.50

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Solution

The fourth proportional to 3,313.56, 4,572.78 and 1,821.50 is: 2,513.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,313.56 : 4,572.78 = 1,821.50 : x
  2. Step 2: Convert to fraction form
    3,313.56/4,572.78 = 1,821.50/x
  3. Step 3: Cross multiply
    3,313.56x = 4,572.78 × 1,821.50
  4. Step 4: Simplify right side
    3,313.56x = 8,329,318.77
  5. Step 5: Solve for x
    x = 8,329,318.77/3,313.56
  6. Step 6: Final answer
    x = 2,513.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.