Home / 459,635.45-689,458.03-139,839.38

Finding the Fourth Proportional to 459,635.45, 689,458.03 and 139,839.38

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Solution

The fourth proportional to 459,635.45, 689,458.03 and 139,839.38 is: 209,760.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,635.45 : 689,458.03 = 139,839.38 : x
  2. Step 2: Convert to fraction form
    459,635.45/689,458.03 = 139,839.38/x
  3. Step 3: Cross multiply
    459,635.45x = 689,458.03 × 139,839.38
  4. Step 4: Simplify right side
    459,635.45x = 96,413,382,239.80
  5. Step 5: Solve for x
    x = 96,413,382,239.80/459,635.45
  6. Step 6: Final answer
    x = 209,760.55

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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.