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Finding the Fourth Proportional to 609,122.70, 840,307.77 and 394,332.30

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Solution

The fourth proportional to 609,122.70, 840,307.77 and 394,332.30 is: 543,996.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,122.70 : 840,307.77 = 394,332.30 : x
  2. Step 2: Convert to fraction form
    609,122.70/840,307.77 = 394,332.30/x
  3. Step 3: Cross multiply
    609,122.70x = 840,307.77 × 394,332.30
  4. Step 4: Simplify right side
    609,122.70x = 331,360,495,651.97
  5. Step 5: Solve for x
    x = 331,360,495,651.97/609,122.70
  6. Step 6: Final answer
    x = 543,996.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.