Home / 1,688.60-2,330.66-1,098.11

Finding the Fourth Proportional to 1,688.60, 2,330.66 and 1,098.11

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Solution

The fourth proportional to 1,688.60, 2,330.66 and 1,098.11 is: 1,515.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.60 : 2,330.66 = 1,098.11 : x
  2. Step 2: Convert to fraction form
    1,688.60/2,330.66 = 1,098.11/x
  3. Step 3: Cross multiply
    1,688.60x = 2,330.66 × 1,098.11
  4. Step 4: Simplify right side
    1,688.60x = 2,559,321.05
  5. Step 5: Solve for x
    x = 2,559,321.05/1,688.60
  6. Step 6: Final answer
    x = 1,515.65

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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.