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Finding the Fourth Proportional to 354,489.33, 530,484.96 and 221,432.25

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Solution

The fourth proportional to 354,489.33, 530,484.96 and 221,432.25 is: 331,368.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,489.33 : 530,484.96 = 221,432.25 : x
  2. Step 2: Convert to fraction form
    354,489.33/530,484.96 = 221,432.25/x
  3. Step 3: Cross multiply
    354,489.33x = 530,484.96 × 221,432.25
  4. Step 4: Simplify right side
    354,489.33x = 117,466,478,283.96
  5. Step 5: Solve for x
    x = 117,466,478,283.96/354,489.33
  6. Step 6: Final answer
    x = 331,368.16

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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.