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Finding the Fourth Proportional to 1,690.91, 2,334.42 and 1,133.22

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Solution

The fourth proportional to 1,690.91, 2,334.42 and 1,133.22 is: 1,564.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.91 : 2,334.42 = 1,133.22 : x
  2. Step 2: Convert to fraction form
    1,690.91/2,334.42 = 1,133.22/x
  3. Step 3: Cross multiply
    1,690.91x = 2,334.42 × 1,133.22
  4. Step 4: Simplify right side
    1,690.91x = 2,645,420.19
  5. Step 5: Solve for x
    x = 2,645,420.19/1,690.91
  6. Step 6: Final answer
    x = 1,564.50

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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.