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Finding the Fourth Proportional to 609,196.68, 912,796.29 and 431,384.40

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Solution

The fourth proportional to 609,196.68, 912,796.29 and 431,384.40 is: 646,369.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,196.68 : 912,796.29 = 431,384.40 : x
  2. Step 2: Convert to fraction form
    609,196.68/912,796.29 = 431,384.40/x
  3. Step 3: Cross multiply
    609,196.68x = 912,796.29 × 431,384.40
  4. Step 4: Simplify right side
    609,196.68x = 393,766,079,883.88
  5. Step 5: Solve for x
    x = 393,766,079,883.88/609,196.68
  6. Step 6: Final answer
    x = 646,369.38

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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.