Home / 420,140.28-630,490.68-217,922.76

Finding the Fourth Proportional to 420,140.28, 630,490.68 and 217,922.76

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Solution

The fourth proportional to 420,140.28, 630,490.68 and 217,922.76 is: 327,029.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,140.28 : 630,490.68 = 217,922.76 : x
  2. Step 2: Convert to fraction form
    420,140.28/630,490.68 = 217,922.76/x
  3. Step 3: Cross multiply
    420,140.28x = 630,490.68 × 217,922.76
  4. Step 4: Simplify right side
    420,140.28x = 137,398,269,139.88
  5. Step 5: Solve for x
    x = 137,398,269,139.88/420,140.28
  6. Step 6: Final answer
    x = 327,029.51

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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.