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Finding the Fourth Proportional to 420,266.70, 630,404.62 and 120,749.76

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Solution

The fourth proportional to 420,266.70, 630,404.62 and 120,749.76 is: 181,125.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,266.70 : 630,404.62 = 120,749.76 : x
  2. Step 2: Convert to fraction form
    420,266.70/630,404.62 = 120,749.76/x
  3. Step 3: Cross multiply
    420,266.70x = 630,404.62 × 120,749.76
  4. Step 4: Simplify right side
    420,266.70x = 76,121,206,266.02
  5. Step 5: Solve for x
    x = 76,121,206,266.02/420,266.70
  6. Step 6: Final answer
    x = 181,125.95

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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.