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Finding the Fourth Proportional to 485,918,404.80, 728,877,607.20 and 448,504,958.40

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Solution

The fourth proportional to 485,918,404.80, 728,877,607.20 and 448,504,958.40 is: 672,757,437.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,918,404.80 : 728,877,607.20 = 448,504,958.40 : x
  2. Step 2: Convert to fraction form
    485,918,404.80/728,877,607.20 = 448,504,958.40/x
  3. Step 3: Cross multiply
    485,918,404.80x = 728,877,607.20 × 448,504,958.40
  4. Step 4: Simplify right side
    485,918,404.80x = 326,905,220,895,927,552
  5. Step 5: Solve for x
    x = 326,905,220,895,927,552/485,918,404.80
  6. Step 6: Final answer
    x = 672,757,437.60

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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.