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Finding the Fourth Proportional to 420,148.72, 630,251.79 and 120,606.26

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Solution

The fourth proportional to 420,148.72, 630,251.79 and 120,606.26 is: 180,917.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,148.72 : 630,251.79 = 120,606.26 : x
  2. Step 2: Convert to fraction form
    420,148.72/630,251.79 = 120,606.26/x
  3. Step 3: Cross multiply
    420,148.72x = 630,251.79 × 120,606.26
  4. Step 4: Simplify right side
    420,148.72x = 76,012,311,250.21
  5. Step 5: Solve for x
    x = 76,012,311,250.21/420,148.72
  6. Step 6: Final answer
    x = 180,917.63

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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.