Home / 1,315,128,473.52-1,972,676,249.86-319,157,752.49

Finding the Fourth Proportional to 1,315,128,473.52, 1,972,676,249.86 and 319,157,752.49

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Solution

The fourth proportional to 1,315,128,473.52, 1,972,676,249.86 and 319,157,752.49 is: 478,732,634.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,128,473.52 : 1,972,676,249.86 = 319,157,752.49 : x
  2. Step 2: Convert to fraction form
    1,315,128,473.52/1,972,676,249.86 = 319,157,752.49/x
  3. Step 3: Cross multiply
    1,315,128,473.52x = 1,972,676,249.86 × 319,157,752.49
  4. Step 4: Simplify right side
    1,315,128,473.52x = 629,594,918,295,719,296
  5. Step 5: Solve for x
    x = 629,594,918,295,719,296/1,315,128,473.52
  6. Step 6: Final answer
    x = 478,732,634.09

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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.