Home / 1,688.38-2,330.10-942.58

Finding the Fourth Proportional to 1,688.38, 2,330.10 and 942.58

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Solution

The fourth proportional to 1,688.38, 2,330.10 and 942.58 is: 1,300.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.38 : 2,330.10 = 942.58 : x
  2. Step 2: Convert to fraction form
    1,688.38/2,330.10 = 942.58/x
  3. Step 3: Cross multiply
    1,688.38x = 2,330.10 × 942.58
  4. Step 4: Simplify right side
    1,688.38x = 2,196,305.66
  5. Step 5: Solve for x
    x = 2,196,305.66/1,688.38
  6. Step 6: Final answer
    x = 1,300.84

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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.