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Finding the Fourth Proportional to 837,756,728.52, 1,256,214,663.90 and 488,115,789.72

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Solution

The fourth proportional to 837,756,728.52, 1,256,214,663.90 and 488,115,789.72 is: 731,928,723.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    837,756,728.52 : 1,256,214,663.90 = 488,115,789.72 : x
  2. Step 2: Convert to fraction form
    837,756,728.52/1,256,214,663.90 = 488,115,789.72/x
  3. Step 3: Cross multiply
    837,756,728.52x = 1,256,214,663.90 × 488,115,789.72
  4. Step 4: Simplify right side
    837,756,728.52x = 613,178,212,727,392,896
  5. Step 5: Solve for x
    x = 613,178,212,727,392,896/837,756,728.52
  6. Step 6: Final answer
    x = 731,928,723.28

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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.