Home / 431,077,920-647,025,679.76-266,818,807.68

Finding the Fourth Proportional to 431,077,920, 647,025,679.76 and 266,818,807.68

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Solution

The fourth proportional to 431,077,920, 647,025,679.76 and 266,818,807.68 is: 400,481,241.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,077,920 : 647,025,679.76 = 266,818,807.68 : x
  2. Step 2: Convert to fraction form
    431,077,920/647,025,679.76 = 266,818,807.68/x
  3. Step 3: Cross multiply
    431,077,920x = 647,025,679.76 × 266,818,807.68
  4. Step 4: Simplify right side
    431,077,920x = 172,638,620,411,904,704
  5. Step 5: Solve for x
    x = 172,638,620,411,904,704/431,077,920
  6. Step 6: Final answer
    x = 400,481,241.10

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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.