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Finding the Fourth Proportional to 354,491.34, 530,487.96 and 221,434.26

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Solution

The fourth proportional to 354,491.34, 530,487.96 and 221,434.26 is: 331,371.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,491.34 : 530,487.96 = 221,434.26 : x
  2. Step 2: Convert to fraction form
    354,491.34/530,487.96 = 221,434.26/x
  3. Step 3: Cross multiply
    354,491.34x = 530,487.96 × 221,434.26
  4. Step 4: Simplify right side
    354,491.34x = 117,468,208,861.51
  5. Step 5: Solve for x
    x = 117,468,208,861.51/354,491.34
  6. Step 6: Final answer
    x = 331,371.17

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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.