Home / 420,151.60-579,858.22-238,890.68

Finding the Fourth Proportional to 420,151.60, 579,858.22 and 238,890.68

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Solution

The fourth proportional to 420,151.60, 579,858.22 and 238,890.68 is: 329,697.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,151.60 : 579,858.22 = 238,890.68 : x
  2. Step 2: Convert to fraction form
    420,151.60/579,858.22 = 238,890.68/x
  3. Step 3: Cross multiply
    420,151.60x = 579,858.22 × 238,890.68
  4. Step 4: Simplify right side
    420,151.60x = 138,522,724,479.39
  5. Step 5: Solve for x
    x = 138,522,724,479.39/420,151.60
  6. Step 6: Final answer
    x = 329,697.01

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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.