Home / 1,688.96-2,329.92-1,025.60

Finding the Fourth Proportional to 1,688.96, 2,329.92 and 1,025.60

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Solution

The fourth proportional to 1,688.96, 2,329.92 and 1,025.60 is: 1,414.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.96 : 2,329.92 = 1,025.60 : x
  2. Step 2: Convert to fraction form
    1,688.96/2,329.92 = 1,025.60/x
  3. Step 3: Cross multiply
    1,688.96x = 2,329.92 × 1,025.60
  4. Step 4: Simplify right side
    1,688.96x = 2,389,565.95
  5. Step 5: Solve for x
    x = 2,389,565.95/1,688.96
  6. Step 6: Final answer
    x = 1,414.82

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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.