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Finding the Fourth Proportional to 1,662.96, 2,294.47 and 1,220.08

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Solution

The fourth proportional to 1,662.96, 2,294.47 and 1,220.08 is: 1,683.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,662.96 : 2,294.47 = 1,220.08 : x
  2. Step 2: Convert to fraction form
    1,662.96/2,294.47 = 1,220.08/x
  3. Step 3: Cross multiply
    1,662.96x = 2,294.47 × 1,220.08
  4. Step 4: Simplify right side
    1,662.96x = 2,799,436.96
  5. Step 5: Solve for x
    x = 2,799,436.96/1,662.96
  6. Step 6: Final answer
    x = 1,683.41

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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.