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Finding the Fourth Proportional to 521,764.80, 782,647.20 and 507,940.80

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Solution

The fourth proportional to 521,764.80, 782,647.20 and 507,940.80 is: 761,911.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,764.80 : 782,647.20 = 507,940.80 : x
  2. Step 2: Convert to fraction form
    521,764.80/782,647.20 = 507,940.80/x
  3. Step 3: Cross multiply
    521,764.80x = 782,647.20 × 507,940.80
  4. Step 4: Simplify right side
    521,764.80x = 397,538,444,885.76
  5. Step 5: Solve for x
    x = 397,538,444,885.76/521,764.80
  6. Step 6: Final answer
    x = 761,911.20

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Similar ratio
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1.5x scale

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.