Home / 420,289.89-630,367.17-120,702.33

Finding the Fourth Proportional to 420,289.89, 630,367.17 and 120,702.33

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Solution

The fourth proportional to 420,289.89, 630,367.17 and 120,702.33 is: 181,034.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,289.89 : 630,367.17 = 120,702.33 : x
  2. Step 2: Convert to fraction form
    420,289.89/630,367.17 = 120,702.33/x
  3. Step 3: Cross multiply
    420,289.89x = 630,367.17 × 120,702.33
  4. Step 4: Simplify right side
    420,289.89x = 76,086,786,174.51
  5. Step 5: Solve for x
    x = 76,086,786,174.51/420,289.89
  6. Step 6: Final answer
    x = 181,034.06

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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.