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Finding the Fourth Proportional to 1,363.96, 1,883.01 and 990.28

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Solution

The fourth proportional to 1,363.96, 1,883.01 and 990.28 is: 1,367.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,363.96 : 1,883.01 = 990.28 : x
  2. Step 2: Convert to fraction form
    1,363.96/1,883.01 = 990.28/x
  3. Step 3: Cross multiply
    1,363.96x = 1,883.01 × 990.28
  4. Step 4: Simplify right side
    1,363.96x = 1,864,707.14
  5. Step 5: Solve for x
    x = 1,864,707.14/1,363.96
  6. Step 6: Final answer
    x = 1,367.13

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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.