Home / 420,138.74-629,885.06-217,517.63

Finding the Fourth Proportional to 420,138.74, 629,885.06 and 217,517.63

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Solution

The fourth proportional to 420,138.74, 629,885.06 and 217,517.63 is: 326,109.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,138.74 : 629,885.06 = 217,517.63 : x
  2. Step 2: Convert to fraction form
    420,138.74/629,885.06 = 217,517.63/x
  3. Step 3: Cross multiply
    420,138.74x = 629,885.06 × 217,517.63
  4. Step 4: Simplify right side
    420,138.74x = 137,011,105,423.61
  5. Step 5: Solve for x
    x = 137,011,105,423.61/420,138.74
  6. Step 6: Final answer
    x = 326,109.19

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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.