Home / 1,688.90-2,330.62-942.82

Finding the Fourth Proportional to 1,688.90, 2,330.62 and 942.82

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Solution

The fourth proportional to 1,688.90, 2,330.62 and 942.82 is: 1,301.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.90 : 2,330.62 = 942.82 : x
  2. Step 2: Convert to fraction form
    1,688.90/2,330.62 = 942.82/x
  3. Step 3: Cross multiply
    1,688.90x = 2,330.62 × 942.82
  4. Step 4: Simplify right side
    1,688.90x = 2,197,355.15
  5. Step 5: Solve for x
    x = 2,197,355.15/1,688.90
  6. Step 6: Final answer
    x = 1,301.06

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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.