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Finding the Fourth Proportional to 605,877.30, 908,378.55 and 339,719.40

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Solution

The fourth proportional to 605,877.30, 908,378.55 and 339,719.40 is: 509,333.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,877.30 : 908,378.55 = 339,719.40 : x
  2. Step 2: Convert to fraction form
    605,877.30/908,378.55 = 339,719.40/x
  3. Step 3: Cross multiply
    605,877.30x = 908,378.55 × 339,719.40
  4. Step 4: Simplify right side
    605,877.30x = 308,593,815,978.87
  5. Step 5: Solve for x
    x = 308,593,815,978.87/605,877.30
  6. Step 6: Final answer
    x = 509,333.85

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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.