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Finding the Fourth Proportional to 379,670.55, 569,511.90 and 99,187.80

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Solution

The fourth proportional to 379,670.55, 569,511.90 and 99,187.80 is: 148,783.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,670.55 : 569,511.90 = 99,187.80 : x
  2. Step 2: Convert to fraction form
    379,670.55/569,511.90 = 99,187.80/x
  3. Step 3: Cross multiply
    379,670.55x = 569,511.90 × 99,187.80
  4. Step 4: Simplify right side
    379,670.55x = 56,488,632,434.82
  5. Step 5: Solve for x
    x = 56,488,632,434.82/379,670.55
  6. Step 6: Final answer
    x = 148,783.29

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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.