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Finding the Fourth Proportional to 817,695, 1,225,745.60 and 391,119.44

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Solution

The fourth proportional to 817,695, 1,225,745.60 and 391,119.44 is: 586,297.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,695 : 1,225,745.60 = 391,119.44 : x
  2. Step 2: Convert to fraction form
    817,695/1,225,745.60 = 391,119.44/x
  3. Step 3: Cross multiply
    817,695x = 1,225,745.60 × 391,119.44
  4. Step 4: Simplify right side
    817,695x = 479,412,924,570.14
  5. Step 5: Solve for x
    x = 479,412,924,570.14/817,695
  6. Step 6: Final answer
    x = 586,297.98

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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.