Home / 1,140.45-1,711.09-400.17

Finding the Fourth Proportional to 1,140.45, 1,711.09 and 400.17

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Solution

The fourth proportional to 1,140.45, 1,711.09 and 400.17 is: 600.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.45 : 1,711.09 = 400.17 : x
  2. Step 2: Convert to fraction form
    1,140.45/1,711.09 = 400.17/x
  3. Step 3: Cross multiply
    1,140.45x = 1,711.09 × 400.17
  4. Step 4: Simplify right side
    1,140.45x = 684,726.89
  5. Step 5: Solve for x
    x = 684,726.89/1,140.45
  6. Step 6: Final answer
    x = 600.40

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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.