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Finding the Fourth Proportional to 521,491.38, 782,741.49 and 251,808.60

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Solution

The fourth proportional to 521,491.38, 782,741.49 and 251,808.60 is: 377,956.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,491.38 : 782,741.49 = 251,808.60 : x
  2. Step 2: Convert to fraction form
    521,491.38/782,741.49 = 251,808.60/x
  3. Step 3: Cross multiply
    521,491.38x = 782,741.49 × 251,808.60
  4. Step 4: Simplify right side
    521,491.38x = 197,101,038,758.81
  5. Step 5: Solve for x
    x = 197,101,038,758.81/521,491.38
  6. Step 6: Final answer
    x = 377,956.47

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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.