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Finding the Fourth Proportional to 340,370.86, 510,490.41 and 129,958.78

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Solution

The fourth proportional to 340,370.86, 510,490.41 and 129,958.78 is: 194,913.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,370.86 : 510,490.41 = 129,958.78 : x
  2. Step 2: Convert to fraction form
    340,370.86/510,490.41 = 129,958.78/x
  3. Step 3: Cross multiply
    340,370.86x = 510,490.41 × 129,958.78
  4. Step 4: Simplify right side
    340,370.86x = 66,342,710,885.30
  5. Step 5: Solve for x
    x = 66,342,710,885.30/340,370.86
  6. Step 6: Final answer
    x = 194,913.02

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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.