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Finding the Fourth Proportional to 1,761.58, 2,431.10 and 1,089.53

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Solution

The fourth proportional to 1,761.58, 2,431.10 and 1,089.53 is: 1,503.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.58 : 2,431.10 = 1,089.53 : x
  2. Step 2: Convert to fraction form
    1,761.58/2,431.10 = 1,089.53/x
  3. Step 3: Cross multiply
    1,761.58x = 2,431.10 × 1,089.53
  4. Step 4: Simplify right side
    1,761.58x = 2,648,756.38
  5. Step 5: Solve for x
    x = 2,648,756.38/1,761.58
  6. Step 6: Final answer
    x = 1,503.63

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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.