Home / 1,431.18-1,975.41-841.90

Finding the Fourth Proportional to 1,431.18, 1,975.41 and 841.90

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Solution

The fourth proportional to 1,431.18, 1,975.41 and 841.90 is: 1,162.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.18 : 1,975.41 = 841.90 : x
  2. Step 2: Convert to fraction form
    1,431.18/1,975.41 = 841.90/x
  3. Step 3: Cross multiply
    1,431.18x = 1,975.41 × 841.90
  4. Step 4: Simplify right side
    1,431.18x = 1,663,097.68
  5. Step 5: Solve for x
    x = 1,663,097.68/1,431.18
  6. Step 6: Final answer
    x = 1,162.05

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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.