Home / 420,151.10-579,857.54-238,890.20

Finding the Fourth Proportional to 420,151.10, 579,857.54 and 238,890.20

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Solution

The fourth proportional to 420,151.10, 579,857.54 and 238,890.20 is: 329,696.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,151.10 : 579,857.54 = 238,890.20 : x
  2. Step 2: Convert to fraction form
    420,151.10/579,857.54 = 238,890.20/x
  3. Step 3: Cross multiply
    420,151.10x = 579,857.54 × 238,890.20
  4. Step 4: Simplify right side
    420,151.10x = 138,522,279,608.37
  5. Step 5: Solve for x
    x = 138,522,279,608.37/420,151.10
  6. Step 6: Final answer
    x = 329,696.34

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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.