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Finding the Fourth Proportional to 355,343.95, 490,373.85 and 202,382.13

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Solution

The fourth proportional to 355,343.95, 490,373.85 and 202,382.13 is: 279,286.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,343.95 : 490,373.85 = 202,382.13 : x
  2. Step 2: Convert to fraction form
    355,343.95/490,373.85 = 202,382.13/x
  3. Step 3: Cross multiply
    355,343.95x = 490,373.85 × 202,382.13
  4. Step 4: Simplify right side
    355,343.95x = 99,242,904,259.30
  5. Step 5: Solve for x
    x = 99,242,904,259.30/355,343.95
  6. Step 6: Final answer
    x = 279,286.88

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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.