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Finding the Fourth Proportional to 664,848,053.80, 997,272,080.70 and 389,349,039.40

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Solution

The fourth proportional to 664,848,053.80, 997,272,080.70 and 389,349,039.40 is: 584,023,559.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,848,053.80 : 997,272,080.70 = 389,349,039.40 : x
  2. Step 2: Convert to fraction form
    664,848,053.80/997,272,080.70 = 389,349,039.40/x
  3. Step 3: Cross multiply
    664,848,053.80x = 997,272,080.70 × 389,349,039.40
  4. Step 4: Simplify right side
    664,848,053.80x = 388,286,926,640,984,256
  5. Step 5: Solve for x
    x = 388,286,926,640,984,256/664,848,053.80
  6. Step 6: Final answer
    x = 584,023,559.10

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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.