Home / 420,827.40-631,243.53-140,343.84

Finding the Fourth Proportional to 420,827.40, 631,243.53 and 140,343.84

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Solution

The fourth proportional to 420,827.40, 631,243.53 and 140,343.84 is: 210,516.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,827.40 : 631,243.53 = 140,343.84 : x
  2. Step 2: Convert to fraction form
    420,827.40/631,243.53 = 140,343.84/x
  3. Step 3: Cross multiply
    420,827.40x = 631,243.53 × 140,343.84
  4. Step 4: Simplify right side
    420,827.40x = 88,591,140,975.36
  5. Step 5: Solve for x
    x = 88,591,140,975.36/420,827.40
  6. Step 6: Final answer
    x = 210,516.57

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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.