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Finding the Fourth Proportional to 699,407,975.12, 965,267,641.26 and 398,066,553.68

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Solution

The fourth proportional to 699,407,975.12, 965,267,641.26 and 398,066,553.68 is: 549,380,014.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,407,975.12 : 965,267,641.26 = 398,066,553.68 : x
  2. Step 2: Convert to fraction form
    699,407,975.12/965,267,641.26 = 398,066,553.68/x
  3. Step 3: Cross multiply
    699,407,975.12x = 965,267,641.26 × 398,066,553.68
  4. Step 4: Simplify right side
    699,407,975.12x = 384,240,763,330,364,416
  5. Step 5: Solve for x
    x = 384,240,763,330,364,416/699,407,975.12
  6. Step 6: Final answer
    x = 549,380,014.24

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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.