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Finding the Fourth Proportional to 379,830.72, 569,344.32 and 143,070.96

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Solution

The fourth proportional to 379,830.72, 569,344.32 and 143,070.96 is: 214,455.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,830.72 : 569,344.32 = 143,070.96 : x
  2. Step 2: Convert to fraction form
    379,830.72/569,344.32 = 143,070.96/x
  3. Step 3: Cross multiply
    379,830.72x = 569,344.32 × 143,070.96
  4. Step 4: Simplify right side
    379,830.72x = 81,456,638,432.95
  5. Step 5: Solve for x
    x = 81,456,638,432.95/379,830.72
  6. Step 6: Final answer
    x = 214,455.11

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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.