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Finding the Fourth Proportional to 699,891,597.80, 965,858,509.86 and 386,619,321.32

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Solution

The fourth proportional to 699,891,597.80, 965,858,509.86 and 386,619,321.32 is: 533,539,140.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,891,597.80 : 965,858,509.86 = 386,619,321.32 : x
  2. Step 2: Convert to fraction form
    699,891,597.80/965,858,509.86 = 386,619,321.32/x
  3. Step 3: Cross multiply
    699,891,597.80x = 965,858,509.86 × 386,619,321.32
  4. Step 4: Simplify right side
    699,891,597.80x = 373,419,561,573,219,712
  5. Step 5: Solve for x
    x = 373,419,561,573,219,712/699,891,597.80
  6. Step 6: Final answer
    x = 533,539,140.56

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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.