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Finding the Fourth Proportional to 340,045.40, 509,630.70 and 206,784.20

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Solution

The fourth proportional to 340,045.40, 509,630.70 and 206,784.20 is: 309,910.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,045.40 : 509,630.70 = 206,784.20 : x
  2. Step 2: Convert to fraction form
    340,045.40/509,630.70 = 206,784.20/x
  3. Step 3: Cross multiply
    340,045.40x = 509,630.70 × 206,784.20
  4. Step 4: Simplify right side
    340,045.40x = 105,383,576,594.94
  5. Step 5: Solve for x
    x = 105,383,576,594.94/340,045.40
  6. Step 6: Final answer
    x = 309,910.31

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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.