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Finding the Fourth Proportional to 543,311.40, 815,744.70 and 307,115.40

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Solution

The fourth proportional to 543,311.40, 815,744.70 and 307,115.40 is: 461,112.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,311.40 : 815,744.70 = 307,115.40 : x
  2. Step 2: Convert to fraction form
    543,311.40/815,744.70 = 307,115.40/x
  3. Step 3: Cross multiply
    543,311.40x = 815,744.70 × 307,115.40
  4. Step 4: Simplify right side
    543,311.40x = 250,527,759,838.38
  5. Step 5: Solve for x
    x = 250,527,759,838.38/543,311.40
  6. Step 6: Final answer
    x = 461,112.65

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1.5x scale

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.