Home / 690,745.45-1,036,258.30-217,320.70

Finding the Fourth Proportional to 690,745.45, 1,036,258.30 and 217,320.70

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Solution

The fourth proportional to 690,745.45, 1,036,258.30 and 217,320.70 is: 326,025.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,745.45 : 1,036,258.30 = 217,320.70 : x
  2. Step 2: Convert to fraction form
    690,745.45/1,036,258.30 = 217,320.70/x
  3. Step 3: Cross multiply
    690,745.45x = 1,036,258.30 × 217,320.70
  4. Step 4: Simplify right side
    690,745.45x = 225,200,379,136.81
  5. Step 5: Solve for x
    x = 225,200,379,136.81/690,745.45
  6. Step 6: Final answer
    x = 326,025.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.