Home / 521,638,466.80-782,457,700.20-279,773,762.80

Finding the Fourth Proportional to 521,638,466.80, 782,457,700.20 and 279,773,762.80

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Solution

The fourth proportional to 521,638,466.80, 782,457,700.20 and 279,773,762.80 is: 419,660,644.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,638,466.80 : 782,457,700.20 = 279,773,762.80 : x
  2. Step 2: Convert to fraction form
    521,638,466.80/782,457,700.20 = 279,773,762.80/x
  3. Step 3: Cross multiply
    521,638,466.80x = 782,457,700.20 × 279,773,762.80
  4. Step 4: Simplify right side
    521,638,466.80x = 218,911,135,016,788,320
  5. Step 5: Solve for x
    x = 218,911,135,016,788,320/521,638,466.80
  6. Step 6: Final answer
    x = 419,660,644.20

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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.