Home / 420,242.40-579,910.08-238,928.16

Finding the Fourth Proportional to 420,242.40, 579,910.08 and 238,928.16

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Solution

The fourth proportional to 420,242.40, 579,910.08 and 238,928.16 is: 329,706.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,242.40 : 579,910.08 = 238,928.16 : x
  2. Step 2: Convert to fraction form
    420,242.40/579,910.08 = 238,928.16/x
  3. Step 3: Cross multiply
    420,242.40x = 579,910.08 × 238,928.16
  4. Step 4: Simplify right side
    420,242.40x = 138,556,848,379.85
  5. Step 5: Solve for x
    x = 138,556,848,379.85/420,242.40
  6. Step 6: Final answer
    x = 329,706.97

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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.