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Finding the Fourth Proportional to 661,859,353.80, 991,497,478.01 and 515,608,119

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Solution

The fourth proportional to 661,859,353.80, 991,497,478.01 and 515,608,119 is: 772,406,020.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,859,353.80 : 991,497,478.01 = 515,608,119 : x
  2. Step 2: Convert to fraction form
    661,859,353.80/991,497,478.01 = 515,608,119/x
  3. Step 3: Cross multiply
    661,859,353.80x = 991,497,478.01 × 515,608,119
  4. Step 4: Simplify right side
    661,859,353.80x = 511,224,149,627,401,920
  5. Step 5: Solve for x
    x = 511,224,149,627,401,920/661,859,353.80
  6. Step 6: Final answer
    x = 772,406,020.54

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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.