Home / 420,118.24-579,778.56-238,860.64

Finding the Fourth Proportional to 420,118.24, 579,778.56 and 238,860.64

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Solution

The fourth proportional to 420,118.24, 579,778.56 and 238,860.64 is: 329,636.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,118.24 : 579,778.56 = 238,860.64 : x
  2. Step 2: Convert to fraction form
    420,118.24/579,778.56 = 238,860.64/x
  3. Step 3: Cross multiply
    420,118.24x = 579,778.56 × 238,860.64
  4. Step 4: Simplify right side
    420,118.24x = 138,486,277,899.88
  5. Step 5: Solve for x
    x = 138,486,277,899.88/420,118.24
  6. Step 6: Final answer
    x = 329,636.43

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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.