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Finding the Fourth Proportional to 661,659,767.60, 992,702,227.80 and 443,556,381.20

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Solution

The fourth proportional to 661,659,767.60, 992,702,227.80 and 443,556,381.20 is: 665,477,076.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,659,767.60 : 992,702,227.80 = 443,556,381.20 : x
  2. Step 2: Convert to fraction form
    661,659,767.60/992,702,227.80 = 443,556,381.20/x
  3. Step 3: Cross multiply
    661,659,767.60x = 992,702,227.80 × 443,556,381.20
  4. Step 4: Simplify right side
    661,659,767.60x = 440,319,407,772,145,984
  5. Step 5: Solve for x
    x = 440,319,407,772,145,984/661,659,767.60
  6. Step 6: Final answer
    x = 665,477,076.49

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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.