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Finding the Fourth Proportional to 355,998.40, 490,432.80 and 248,372.80

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Solution

The fourth proportional to 355,998.40, 490,432.80 and 248,372.80 is: 342,164.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,998.40 : 490,432.80 = 248,372.80 : x
  2. Step 2: Convert to fraction form
    355,998.40/490,432.80 = 248,372.80/x
  3. Step 3: Cross multiply
    355,998.40x = 490,432.80 × 248,372.80
  4. Step 4: Simplify right side
    355,998.40x = 121,810,167,747.84
  5. Step 5: Solve for x
    x = 121,810,167,747.84/355,998.40
  6. Step 6: Final answer
    x = 342,164.93

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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.