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Finding the Fourth Proportional to 354,662.98, 530,746.26 and 221,605.90

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Solution

The fourth proportional to 354,662.98, 530,746.26 and 221,605.90 is: 331,628.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,662.98 : 530,746.26 = 221,605.90 : x
  2. Step 2: Convert to fraction form
    354,662.98/530,746.26 = 221,605.90/x
  3. Step 3: Cross multiply
    354,662.98x = 530,746.26 × 221,605.90
  4. Step 4: Simplify right side
    354,662.98x = 117,616,500,461.05
  5. Step 5: Solve for x
    x = 117,616,500,461.05/354,662.98
  6. Step 6: Final answer
    x = 331,628.92

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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.