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Finding the Fourth Proportional to 353,855.40, 488,360.78 and 210,615.92

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Solution

The fourth proportional to 353,855.40, 488,360.78 and 210,615.92 is: 290,673.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,855.40 : 488,360.78 = 210,615.92 : x
  2. Step 2: Convert to fraction form
    353,855.40/488,360.78 = 210,615.92/x
  3. Step 3: Cross multiply
    353,855.40x = 488,360.78 × 210,615.92
  4. Step 4: Simplify right side
    353,855.40x = 102,856,554,971.62
  5. Step 5: Solve for x
    x = 102,856,554,971.62/353,855.40
  6. Step 6: Final answer
    x = 290,673.97

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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.