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Finding the Fourth Proportional to 420,430.34, 630,753.48 and 120,934.37

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Solution

The fourth proportional to 420,430.34, 630,753.48 and 120,934.37 is: 181,432.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,430.34 : 630,753.48 = 120,934.37 : x
  2. Step 2: Convert to fraction form
    420,430.34/630,753.48 = 120,934.37/x
  3. Step 3: Cross multiply
    420,430.34x = 630,753.48 × 120,934.37
  4. Step 4: Simplify right side
    420,430.34x = 76,279,771,575.34
  5. Step 5: Solve for x
    x = 76,279,771,575.34/420,430.34
  6. Step 6: Final answer
    x = 181,432.61

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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.