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Finding the Fourth Proportional to 409,942.40, 614,913.60 and 339,958.40

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Solution

The fourth proportional to 409,942.40, 614,913.60 and 339,958.40 is: 509,937.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,942.40 : 614,913.60 = 339,958.40 : x
  2. Step 2: Convert to fraction form
    409,942.40/614,913.60 = 339,958.40/x
  3. Step 3: Cross multiply
    409,942.40x = 614,913.60 × 339,958.40
  4. Step 4: Simplify right side
    409,942.40x = 209,045,043,594.24
  5. Step 5: Solve for x
    x = 209,045,043,594.24/409,942.40
  6. Step 6: Final answer
    x = 509,937.60

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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.