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Finding the Fourth Proportional to 420,500.70, 630,851.49 and 140,020.38

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Solution

The fourth proportional to 420,500.70, 630,851.49 and 140,020.38 is: 210,064.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,500.70 : 630,851.49 = 140,020.38 : x
  2. Step 2: Convert to fraction form
    420,500.70/630,851.49 = 140,020.38/x
  3. Step 3: Cross multiply
    420,500.70x = 630,851.49 × 140,020.38
  4. Step 4: Simplify right side
    420,500.70x = 88,332,065,353.37
  5. Step 5: Solve for x
    x = 88,332,065,353.37/420,500.70
  6. Step 6: Final answer
    x = 210,064.02

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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.