Home / 721,225,421.91-1,081,562,360.20-393,525,781.38

Finding the Fourth Proportional to 721,225,421.91, 1,081,562,360.20 and 393,525,781.38

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Solution

The fourth proportional to 721,225,421.91, 1,081,562,360.20 and 393,525,781.38 is: 590,138,200.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,225,421.91 : 1,081,562,360.20 = 393,525,781.38 : x
  2. Step 2: Convert to fraction form
    721,225,421.91/1,081,562,360.20 = 393,525,781.38/x
  3. Step 3: Cross multiply
    721,225,421.91x = 1,081,562,360.20 × 393,525,781.38
  4. Step 4: Simplify right side
    721,225,421.91x = 425,622,672,907,918,208
  5. Step 5: Solve for x
    x = 425,622,672,907,918,208/721,225,421.91
  6. Step 6: Final answer
    x = 590,138,200.87

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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.