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Finding the Fourth Proportional to 661,666,065.60, 992,711,674.80 and 443,562,679.20

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Solution

The fourth proportional to 661,666,065.60, 992,711,674.80 and 443,562,679.20 is: 665,486,524.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,666,065.60 : 992,711,674.80 = 443,562,679.20 : x
  2. Step 2: Convert to fraction form
    661,666,065.60/992,711,674.80 = 443,562,679.20/x
  3. Step 3: Cross multiply
    661,666,065.60x = 992,711,674.80 × 443,562,679.20
  4. Step 4: Simplify right side
    661,666,065.60x = 440,329,850,147,407,104
  5. Step 5: Solve for x
    x = 440,329,850,147,407,104/661,666,065.60
  6. Step 6: Final answer
    x = 665,486,524.15

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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.