Home / 420,071.11-579,743.09-256,823.41

Finding the Fourth Proportional to 420,071.11, 579,743.09 and 256,823.41

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Solution

The fourth proportional to 420,071.11, 579,743.09 and 256,823.41 is: 354,443.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,071.11 : 579,743.09 = 256,823.41 : x
  2. Step 2: Convert to fraction form
    420,071.11/579,743.09 = 256,823.41/x
  3. Step 3: Cross multiply
    420,071.11x = 579,743.09 × 256,823.41
  4. Step 4: Simplify right side
    420,071.11x = 148,891,597,297.74
  5. Step 5: Solve for x
    x = 148,891,597,297.74/420,071.11
  6. Step 6: Final answer
    x = 354,443.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.