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Finding the Fourth Proportional to 1,608.33, 2,407.80 and 990.18

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Solution

The fourth proportional to 1,608.33, 2,407.80 and 990.18 is: 1,482.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.33 : 2,407.80 = 990.18 : x
  2. Step 2: Convert to fraction form
    1,608.33/2,407.80 = 990.18/x
  3. Step 3: Cross multiply
    1,608.33x = 2,407.80 × 990.18
  4. Step 4: Simplify right side
    1,608.33x = 2,384,155.40
  5. Step 5: Solve for x
    x = 2,384,155.40/1,608.33
  6. Step 6: Final answer
    x = 1,482.38

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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.