Home / 420,748.02-631,234.79-121,254.77

Finding the Fourth Proportional to 420,748.02, 631,234.79 and 121,254.77

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Solution

The fourth proportional to 420,748.02, 631,234.79 and 121,254.77 is: 181,914.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,748.02 : 631,234.79 = 121,254.77 : x
  2. Step 2: Convert to fraction form
    420,748.02/631,234.79 = 121,254.77/x
  3. Step 3: Cross multiply
    420,748.02x = 631,234.79 × 121,254.77
  4. Step 4: Simplify right side
    420,748.02x = 76,540,230,703.97
  5. Step 5: Solve for x
    x = 76,540,230,703.97/420,748.02
  6. Step 6: Final answer
    x = 181,914.65

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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.