Home / 721,638,219.20-995,860,742.21-391,613,358.20

Finding the Fourth Proportional to 721,638,219.20, 995,860,742.21 and 391,613,358.20

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Solution

The fourth proportional to 721,638,219.20, 995,860,742.21 and 391,613,358.20 is: 540,426,434.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,638,219.20 : 995,860,742.21 = 391,613,358.20 : x
  2. Step 2: Convert to fraction form
    721,638,219.20/995,860,742.21 = 391,613,358.20/x
  3. Step 3: Cross multiply
    721,638,219.20x = 995,860,742.21 × 391,613,358.20
  4. Step 4: Simplify right side
    721,638,219.20x = 389,992,369,549,465,216
  5. Step 5: Solve for x
    x = 389,992,369,549,465,216/721,638,219.20
  6. Step 6: Final answer
    x = 540,426,434.15

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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.