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Finding the Fourth Proportional to 379,886.20, 569,829.30 and 291,312.70

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Solution

The fourth proportional to 379,886.20, 569,829.30 and 291,312.70 is: 436,969.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,886.20 : 569,829.30 = 291,312.70 : x
  2. Step 2: Convert to fraction form
    379,886.20/569,829.30 = 291,312.70/x
  3. Step 3: Cross multiply
    379,886.20x = 569,829.30 × 291,312.70
  4. Step 4: Simplify right side
    379,886.20x = 165,998,511,922.11
  5. Step 5: Solve for x
    x = 165,998,511,922.11/379,886.20
  6. Step 6: Final answer
    x = 436,969.05

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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.