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Finding the Fourth Proportional to 425,336.72, 638,103.84 and 144,856.40

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Solution

The fourth proportional to 425,336.72, 638,103.84 and 144,856.40 is: 217,318.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,336.72 : 638,103.84 = 144,856.40 : x
  2. Step 2: Convert to fraction form
    425,336.72/638,103.84 = 144,856.40/x
  3. Step 3: Cross multiply
    425,336.72x = 638,103.84 × 144,856.40
  4. Step 4: Simplify right side
    425,336.72x = 92,433,425,088.58
  5. Step 5: Solve for x
    x = 92,433,425,088.58/425,336.72
  6. Step 6: Final answer
    x = 217,318.23

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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.