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Finding the Fourth Proportional to 1,608.59, 2,219.75 and 900.31

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Solution

The fourth proportional to 1,608.59, 2,219.75 and 900.31 is: 1,242.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.59 : 2,219.75 = 900.31 : x
  2. Step 2: Convert to fraction form
    1,608.59/2,219.75 = 900.31/x
  3. Step 3: Cross multiply
    1,608.59x = 2,219.75 × 900.31
  4. Step 4: Simplify right side
    1,608.59x = 1,998,461.13
  5. Step 5: Solve for x
    x = 1,998,461.13/1,608.59
  6. Step 6: Final answer
    x = 1,242.37

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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.