Home / 1,121.14-1,681.81-341.16

Finding the Fourth Proportional to 1,121.14, 1,681.81 and 341.16

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Solution

The fourth proportional to 1,121.14, 1,681.81 and 341.16 is: 511.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.14 : 1,681.81 = 341.16 : x
  2. Step 2: Convert to fraction form
    1,121.14/1,681.81 = 341.16/x
  3. Step 3: Cross multiply
    1,121.14x = 1,681.81 × 341.16
  4. Step 4: Simplify right side
    1,121.14x = 573,756.18
  5. Step 5: Solve for x
    x = 573,756.18/1,121.14
  6. Step 6: Final answer
    x = 511.76

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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.