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Finding the Fourth Proportional to 521,750.40, 782,625.60 and 321,421.20

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Solution

The fourth proportional to 521,750.40, 782,625.60 and 321,421.20 is: 482,131.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,750.40 : 782,625.60 = 321,421.20 : x
  2. Step 2: Convert to fraction form
    521,750.40/782,625.60 = 321,421.20/x
  3. Step 3: Cross multiply
    521,750.40x = 782,625.60 × 321,421.20
  4. Step 4: Simplify right side
    521,750.40x = 251,552,459,502.72
  5. Step 5: Solve for x
    x = 251,552,459,502.72/521,750.40
  6. Step 6: Final answer
    x = 482,131.80

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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.