Home / 343,742.45-515,638.51-143,861.72

Finding the Fourth Proportional to 343,742.45, 515,638.51 and 143,861.72

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Solution

The fourth proportional to 343,742.45, 515,638.51 and 143,861.72 is: 215,802.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,742.45 : 515,638.51 = 143,861.72 : x
  2. Step 2: Convert to fraction form
    343,742.45/515,638.51 = 143,861.72/x
  3. Step 3: Cross multiply
    343,742.45x = 515,638.51 × 143,861.72
  4. Step 4: Simplify right side
    343,742.45x = 74,180,640,008.99
  5. Step 5: Solve for x
    x = 74,180,640,008.99/343,742.45
  6. Step 6: Final answer
    x = 215,802.97

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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.