Home / 721,607,137.40-995,817,849.72-391,582,276.40

Finding the Fourth Proportional to 721,607,137.40, 995,817,849.72 and 391,582,276.40

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Solution

The fourth proportional to 721,607,137.40, 995,817,849.72 and 391,582,276.40 is: 540,383,541.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,607,137.40 : 995,817,849.72 = 391,582,276.40 : x
  2. Step 2: Convert to fraction form
    721,607,137.40/995,817,849.72 = 391,582,276.40/x
  3. Step 3: Cross multiply
    721,607,137.40x = 995,817,849.72 × 391,582,276.40
  4. Step 4: Simplify right side
    721,607,137.40x = 389,944,620,473,110,720
  5. Step 5: Solve for x
    x = 389,944,620,473,110,720/721,607,137.40
  6. Step 6: Final answer
    x = 540,383,541.49

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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.