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Finding the Fourth Proportional to 556,615,699.82, 768,391,186.27 and 321,620,904.10

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Solution

The fourth proportional to 556,615,699.82, 768,391,186.27 and 321,620,904.10 is: 443,987,958.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,615,699.82 : 768,391,186.27 = 321,620,904.10 : x
  2. Step 2: Convert to fraction form
    556,615,699.82/768,391,186.27 = 321,620,904.10/x
  3. Step 3: Cross multiply
    556,615,699.82x = 768,391,186.27 × 321,620,904.10
  4. Step 4: Simplify right side
    556,615,699.82x = 247,130,668,026,786,976
  5. Step 5: Solve for x
    x = 247,130,668,026,786,976/556,615,699.82
  6. Step 6: Final answer
    x = 443,987,958.14

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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.