Home / 420,470.60-630,788.99-154,233.59

Finding the Fourth Proportional to 420,470.60, 630,788.99 and 154,233.59

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Solution

The fourth proportional to 420,470.60, 630,788.99 and 154,233.59 is: 231,380.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,470.60 : 630,788.99 = 154,233.59 : x
  2. Step 2: Convert to fraction form
    420,470.60/630,788.99 = 154,233.59/x
  3. Step 3: Cross multiply
    420,470.60x = 630,788.99 × 154,233.59
  4. Step 4: Simplify right side
    420,470.60x = 97,288,846,535.06
  5. Step 5: Solve for x
    x = 97,288,846,535.06/420,470.60
  6. Step 6: Final answer
    x = 231,380.86

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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.