Home / 1,688.13-2,329.39-942.05

Finding the Fourth Proportional to 1,688.13, 2,329.39 and 942.05

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Solution

The fourth proportional to 1,688.13, 2,329.39 and 942.05 is: 1,299.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.13 : 2,329.39 = 942.05 : x
  2. Step 2: Convert to fraction form
    1,688.13/2,329.39 = 942.05/x
  3. Step 3: Cross multiply
    1,688.13x = 2,329.39 × 942.05
  4. Step 4: Simplify right side
    1,688.13x = 2,194,408.85
  5. Step 5: Solve for x
    x = 2,194,408.85/1,688.13
  6. Step 6: Final answer
    x = 1,299.91

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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.