Home / 420,939.06-631,685.38-154,701.86

Finding the Fourth Proportional to 420,939.06, 631,685.38 and 154,701.86

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Solution

The fourth proportional to 420,939.06, 631,685.38 and 154,701.86 is: 232,154.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,939.06 : 631,685.38 = 154,701.86 : x
  2. Step 2: Convert to fraction form
    420,939.06/631,685.38 = 154,701.86/x
  3. Step 3: Cross multiply
    420,939.06x = 631,685.38 × 154,701.86
  4. Step 4: Simplify right side
    420,939.06x = 97,722,903,220.81
  5. Step 5: Solve for x
    x = 97,722,903,220.81/420,939.06
  6. Step 6: Final answer
    x = 232,154.51

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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.