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Finding the Fourth Proportional to 389,227.68, 583,490.16 and 139,851.36

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Solution

The fourth proportional to 389,227.68, 583,490.16 and 139,851.36 is: 209,650.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,227.68 : 583,490.16 = 139,851.36 : x
  2. Step 2: Convert to fraction form
    389,227.68/583,490.16 = 139,851.36/x
  3. Step 3: Cross multiply
    389,227.68x = 583,490.16 × 139,851.36
  4. Step 4: Simplify right side
    389,227.68x = 81,601,892,422.62
  5. Step 5: Solve for x
    x = 81,601,892,422.62/389,227.68
  6. Step 6: Final answer
    x = 209,650.79

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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.