Home / 515,485,737.63-711,372,160.23-280,539,214.47

Finding the Fourth Proportional to 515,485,737.63, 711,372,160.23 and 280,539,214.47

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Solution

The fourth proportional to 515,485,737.63, 711,372,160.23 and 280,539,214.47 is: 387,145,118.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,485,737.63 : 711,372,160.23 = 280,539,214.47 : x
  2. Step 2: Convert to fraction form
    515,485,737.63/711,372,160.23 = 280,539,214.47/x
  3. Step 3: Cross multiply
    515,485,737.63x = 711,372,160.23 × 280,539,214.47
  4. Step 4: Simplify right side
    515,485,737.63x = 199,567,787,026,751,200
  5. Step 5: Solve for x
    x = 199,567,787,026,751,200/515,485,737.63
  6. Step 6: Final answer
    x = 387,145,118.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.