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Finding the Fourth Proportional to 431,090,259.20, 646,635,388.80 and 431,090,259.20

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Solution

The fourth proportional to 431,090,259.20, 646,635,388.80 and 431,090,259.20 is: 646,635,388.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,090,259.20 : 646,635,388.80 = 431,090,259.20 : x
  2. Step 2: Convert to fraction form
    431,090,259.20/646,635,388.80 = 431,090,259.20/x
  3. Step 3: Cross multiply
    431,090,259.20x = 646,635,388.80 × 431,090,259.20
  4. Step 4: Simplify right side
    431,090,259.20x = 278,758,217,365,684,736
  5. Step 5: Solve for x
    x = 278,758,217,365,684,736/431,090,259.20
  6. Step 6: Final answer
    x = 646,635,388.80

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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.