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Finding the Fourth Proportional to 347,614.40, 521,421.60 and 339,838.40

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Solution

The fourth proportional to 347,614.40, 521,421.60 and 339,838.40 is: 509,757.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,614.40 : 521,421.60 = 339,838.40 : x
  2. Step 2: Convert to fraction form
    347,614.40/521,421.60 = 339,838.40/x
  3. Step 3: Cross multiply
    347,614.40x = 521,421.60 × 339,838.40
  4. Step 4: Simplify right side
    347,614.40x = 177,199,082,269.44
  5. Step 5: Solve for x
    x = 177,199,082,269.44/347,614.40
  6. Step 6: Final answer
    x = 509,757.60

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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.