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Finding the Fourth Proportional to 340,136.40, 509,767.20 and 206,875.20

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Solution

The fourth proportional to 340,136.40, 509,767.20 and 206,875.20 is: 310,046.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,136.40 : 509,767.20 = 206,875.20 : x
  2. Step 2: Convert to fraction form
    340,136.40/509,767.20 = 206,875.20/x
  3. Step 3: Cross multiply
    340,136.40x = 509,767.20 × 206,875.20
  4. Step 4: Simplify right side
    340,136.40x = 105,458,191,453.44
  5. Step 5: Solve for x
    x = 105,458,191,453.44/340,136.40
  6. Step 6: Final answer
    x = 310,046.77

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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.