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Finding the Fourth Proportional to 355,196.12, 490,180.28 and 212,039.28

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Solution

The fourth proportional to 355,196.12, 490,180.28 and 212,039.28 is: 292,619.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,196.12 : 490,180.28 = 212,039.28 : x
  2. Step 2: Convert to fraction form
    355,196.12/490,180.28 = 212,039.28/x
  3. Step 3: Cross multiply
    355,196.12x = 490,180.28 × 212,039.28
  4. Step 4: Simplify right side
    355,196.12x = 103,937,472,581.20
  5. Step 5: Solve for x
    x = 103,937,472,581.20/355,196.12
  6. Step 6: Final answer
    x = 292,619.96

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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.