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Finding the Fourth Proportional to 354,726.03, 531,137.70 and 221,340.90

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Solution

The fourth proportional to 354,726.03, 531,137.70 and 221,340.90 is: 331,417.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,726.03 : 531,137.70 = 221,340.90 : x
  2. Step 2: Convert to fraction form
    354,726.03/531,137.70 = 221,340.90/x
  3. Step 3: Cross multiply
    354,726.03x = 531,137.70 × 221,340.90
  4. Step 4: Simplify right side
    354,726.03x = 117,562,496,541.93
  5. Step 5: Solve for x
    x = 117,562,496,541.93/354,726.03
  6. Step 6: Final answer
    x = 331,417.73

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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.