Home / 1,331.17-1,989.92-1,054.15

Finding the Fourth Proportional to 1,331.17, 1,989.92 and 1,054.15

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Solution

The fourth proportional to 1,331.17, 1,989.92 and 1,054.15 is: 1,575.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.17 : 1,989.92 = 1,054.15 : x
  2. Step 2: Convert to fraction form
    1,331.17/1,989.92 = 1,054.15/x
  3. Step 3: Cross multiply
    1,331.17x = 1,989.92 × 1,054.15
  4. Step 4: Simplify right side
    1,331.17x = 2,097,674.17
  5. Step 5: Solve for x
    x = 2,097,674.17/1,331.17
  6. Step 6: Final answer
    x = 1,575.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.