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Finding the Fourth Proportional to 355,138.06, 490,071.78 and 193,990.78

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Solution

The fourth proportional to 355,138.06, 490,071.78 and 193,990.78 is: 267,697.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,138.06 : 490,071.78 = 193,990.78 : x
  2. Step 2: Convert to fraction form
    355,138.06/490,071.78 = 193,990.78/x
  3. Step 3: Cross multiply
    355,138.06x = 490,071.78 × 193,990.78
  4. Step 4: Simplify right side
    355,138.06x = 95,069,406,858.19
  5. Step 5: Solve for x
    x = 95,069,406,858.19/355,138.06
  6. Step 6: Final answer
    x = 267,697.04

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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.