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Finding the Fourth Proportional to 379,885.20, 569,827.80 and 291,311.70

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Solution

The fourth proportional to 379,885.20, 569,827.80 and 291,311.70 is: 436,967.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,885.20 : 569,827.80 = 291,311.70 : x
  2. Step 2: Convert to fraction form
    379,885.20/569,827.80 = 291,311.70/x
  3. Step 3: Cross multiply
    379,885.20x = 569,827.80 × 291,311.70
  4. Step 4: Simplify right side
    379,885.20x = 165,997,505,125.26
  5. Step 5: Solve for x
    x = 165,997,505,125.26/379,885.20
  6. Step 6: Final answer
    x = 436,967.55

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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.