Home / 1,688.45-2,330.15-942.40

Finding the Fourth Proportional to 1,688.45, 2,330.15 and 942.40

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Solution

The fourth proportional to 1,688.45, 2,330.15 and 942.40 is: 1,300.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.45 : 2,330.15 = 942.40 : x
  2. Step 2: Convert to fraction form
    1,688.45/2,330.15 = 942.40/x
  3. Step 3: Cross multiply
    1,688.45x = 2,330.15 × 942.40
  4. Step 4: Simplify right side
    1,688.45x = 2,195,933.36
  5. Step 5: Solve for x
    x = 2,195,933.36/1,688.45
  6. Step 6: Final answer
    x = 1,300.56

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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.