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Finding the Fourth Proportional to 343,742.32, 515,638.32 and 143,861.59

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Solution

The fourth proportional to 343,742.32, 515,638.32 and 143,861.59 is: 215,802.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,742.32 : 515,638.32 = 143,861.59 : x
  2. Step 2: Convert to fraction form
    343,742.32/515,638.32 = 143,861.59/x
  3. Step 3: Cross multiply
    343,742.32x = 515,638.32 × 143,861.59
  4. Step 4: Simplify right side
    343,742.32x = 74,180,548,580.13
  5. Step 5: Solve for x
    x = 74,180,548,580.13/343,742.32
  6. Step 6: Final answer
    x = 215,802.78

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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.