Home / 420,837.60-631,256.40-263,551.20

Finding the Fourth Proportional to 420,837.60, 631,256.40 and 263,551.20

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Solution

The fourth proportional to 420,837.60, 631,256.40 and 263,551.20 is: 395,326.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,837.60 : 631,256.40 = 263,551.20 : x
  2. Step 2: Convert to fraction form
    420,837.60/631,256.40 = 263,551.20/x
  3. Step 3: Cross multiply
    420,837.60x = 631,256.40 × 263,551.20
  4. Step 4: Simplify right side
    420,837.60x = 166,368,381,727.68
  5. Step 5: Solve for x
    x = 166,368,381,727.68/420,837.60
  6. Step 6: Final answer
    x = 395,326.80

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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.