Home / 420,610.35-630,821.19-121,024.15

Finding the Fourth Proportional to 420,610.35, 630,821.19 and 121,024.15

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Solution

The fourth proportional to 420,610.35, 630,821.19 and 121,024.15 is: 181,509.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,610.35 : 630,821.19 = 121,024.15 : x
  2. Step 2: Convert to fraction form
    420,610.35/630,821.19 = 121,024.15/x
  3. Step 3: Cross multiply
    420,610.35x = 630,821.19 × 121,024.15
  4. Step 4: Simplify right side
    420,610.35x = 76,344,598,321.74
  5. Step 5: Solve for x
    x = 76,344,598,321.74/420,610.35
  6. Step 6: Final answer
    x = 181,509.08

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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.