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Finding the Fourth Proportional to 1,604.68, 2,213.92 and 983.32

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Solution

The fourth proportional to 1,604.68, 2,213.92 and 983.32 is: 1,356.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,604.68 : 2,213.92 = 983.32 : x
  2. Step 2: Convert to fraction form
    1,604.68/2,213.92 = 983.32/x
  3. Step 3: Cross multiply
    1,604.68x = 2,213.92 × 983.32
  4. Step 4: Simplify right side
    1,604.68x = 2,176,991.81
  5. Step 5: Solve for x
    x = 2,176,991.81/1,604.68
  6. Step 6: Final answer
    x = 1,356.65

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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.