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Finding the Fourth Proportional to 521,630.88, 782,840.40 and 381,750.36

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Solution

The fourth proportional to 521,630.88, 782,840.40 and 381,750.36 is: 572,913.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,630.88 : 782,840.40 = 381,750.36 : x
  2. Step 2: Convert to fraction form
    521,630.88/782,840.40 = 381,750.36/x
  3. Step 3: Cross multiply
    521,630.88x = 782,840.40 × 381,750.36
  4. Step 4: Simplify right side
    521,630.88x = 298,849,604,522.54
  5. Step 5: Solve for x
    x = 298,849,604,522.54/521,630.88
  6. Step 6: Final answer
    x = 572,913.94

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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.