Home / 1,411.21-2,113.57-760.38

Finding the Fourth Proportional to 1,411.21, 2,113.57 and 760.38

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Solution

The fourth proportional to 1,411.21, 2,113.57 and 760.38 is: 1,138.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.21 : 2,113.57 = 760.38 : x
  2. Step 2: Convert to fraction form
    1,411.21/2,113.57 = 760.38/x
  3. Step 3: Cross multiply
    1,411.21x = 2,113.57 × 760.38
  4. Step 4: Simplify right side
    1,411.21x = 1,607,116.36
  5. Step 5: Solve for x
    x = 1,607,116.36/1,411.21
  6. Step 6: Final answer
    x = 1,138.82

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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.