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Finding the Fourth Proportional to 339,140.80, 508,711.20 and 319,787.20

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Solution

The fourth proportional to 339,140.80, 508,711.20 and 319,787.20 is: 479,680.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,140.80 : 508,711.20 = 319,787.20 : x
  2. Step 2: Convert to fraction form
    339,140.80/508,711.20 = 319,787.20/x
  3. Step 3: Cross multiply
    339,140.80x = 508,711.20 × 319,787.20
  4. Step 4: Simplify right side
    339,140.80x = 162,679,330,256.64
  5. Step 5: Solve for x
    x = 162,679,330,256.64/339,140.80
  6. Step 6: Final answer
    x = 479,680.80

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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.