Home / 1,331.67-1,994.40-1,285.53

Finding the Fourth Proportional to 1,331.67, 1,994.40 and 1,285.53

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Solution

The fourth proportional to 1,331.67, 1,994.40 and 1,285.53 is: 1,925.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.67 : 1,994.40 = 1,285.53 : x
  2. Step 2: Convert to fraction form
    1,331.67/1,994.40 = 1,285.53/x
  3. Step 3: Cross multiply
    1,331.67x = 1,994.40 × 1,285.53
  4. Step 4: Simplify right side
    1,331.67x = 2,563,861.03
  5. Step 5: Solve for x
    x = 2,563,861.03/1,331.67
  6. Step 6: Final answer
    x = 1,925.30

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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.