Home / 721,638,218.70-995,860,741.52-391,613,357.70

Finding the Fourth Proportional to 721,638,218.70, 995,860,741.52 and 391,613,357.70

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Solution

The fourth proportional to 721,638,218.70, 995,860,741.52 and 391,613,357.70 is: 540,426,433.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,638,218.70 : 995,860,741.52 = 391,613,357.70 : x
  2. Step 2: Convert to fraction form
    721,638,218.70/995,860,741.52 = 391,613,357.70/x
  3. Step 3: Cross multiply
    721,638,218.70x = 995,860,741.52 × 391,613,357.70
  4. Step 4: Simplify right side
    721,638,218.70x = 389,992,368,788,259,008
  5. Step 5: Solve for x
    x = 389,992,368,788,259,008/721,638,218.70
  6. Step 6: Final answer
    x = 540,426,433.47

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1.5x scale

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.