Home / 430,611.92-645,918.24-205,919.36

Finding the Fourth Proportional to 430,611.92, 645,918.24 and 205,919.36

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Solution

The fourth proportional to 430,611.92, 645,918.24 and 205,919.36 is: 308,879.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,611.92 : 645,918.24 = 205,919.36 : x
  2. Step 2: Convert to fraction form
    430,611.92/645,918.24 = 205,919.36/x
  3. Step 3: Cross multiply
    430,611.92x = 645,918.24 × 205,919.36
  4. Step 4: Simplify right side
    430,611.92x = 133,007,070,593.13
  5. Step 5: Solve for x
    x = 133,007,070,593.13/430,611.92
  6. Step 6: Final answer
    x = 308,879.21

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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.