Home / 420,190.47-630,324.18-167,409.72

Finding the Fourth Proportional to 420,190.47, 630,324.18 and 167,409.72

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Solution

The fourth proportional to 420,190.47, 630,324.18 and 167,409.72 is: 251,129.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,190.47 : 630,324.18 = 167,409.72 : x
  2. Step 2: Convert to fraction form
    420,190.47/630,324.18 = 167,409.72/x
  3. Step 3: Cross multiply
    420,190.47x = 630,324.18 × 167,409.72
  4. Step 4: Simplify right side
    420,190.47x = 105,522,394,483.03
  5. Step 5: Solve for x
    x = 105,522,394,483.03/420,190.47
  6. Step 6: Final answer
    x = 251,129.91

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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.