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Finding the Fourth Proportional to 420,537.89, 630,815.79 and 150,683.65

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Solution

The fourth proportional to 420,537.89, 630,815.79 and 150,683.65 is: 226,028.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,537.89 : 630,815.79 = 150,683.65 : x
  2. Step 2: Convert to fraction form
    420,537.89/630,815.79 = 150,683.65/x
  3. Step 3: Cross multiply
    420,537.89x = 630,815.79 × 150,683.65
  4. Step 4: Simplify right side
    420,537.89x = 95,053,625,714.83
  5. Step 5: Solve for x
    x = 95,053,625,714.83/420,537.89
  6. Step 6: Final answer
    x = 226,028.68

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1.5x scale

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.