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Finding the Fourth Proportional to 379,081.67, 523,118.99 and 209,312.15

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Solution

The fourth proportional to 379,081.67, 523,118.99 and 209,312.15 is: 288,843.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,081.67 : 523,118.99 = 209,312.15 : x
  2. Step 2: Convert to fraction form
    379,081.67/523,118.99 = 209,312.15/x
  3. Step 3: Cross multiply
    379,081.67x = 523,118.99 × 209,312.15
  4. Step 4: Simplify right side
    379,081.67x = 109,495,158,410.41
  5. Step 5: Solve for x
    x = 109,495,158,410.41/379,081.67
  6. Step 6: Final answer
    x = 288,843.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.