Home / 515,485,708.46-711,372,120.00-280,539,185.30

Finding the Fourth Proportional to 515,485,708.46, 711,372,120.00 and 280,539,185.30

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Solution

The fourth proportional to 515,485,708.46, 711,372,120.00 and 280,539,185.30 is: 387,145,078.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,485,708.46 : 711,372,120.00 = 280,539,185.30 : x
  2. Step 2: Convert to fraction form
    515,485,708.46/711,372,120.00 = 280,539,185.30/x
  3. Step 3: Cross multiply
    515,485,708.46x = 711,372,120.00 × 280,539,185.30
  4. Step 4: Simplify right side
    515,485,708.46x = 199,567,754,989,572,032
  5. Step 5: Solve for x
    x = 199,567,754,989,572,032/515,485,708.46
  6. Step 6: Final answer
    x = 387,145,078.35

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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.