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Finding the Fourth Proportional to 355,573.13, 490,690.87 and 194,428.28

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Solution

The fourth proportional to 355,573.13, 490,690.87 and 194,428.28 is: 268,311.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,573.13 : 490,690.87 = 194,428.28 : x
  2. Step 2: Convert to fraction form
    355,573.13/490,690.87 = 194,428.28/x
  3. Step 3: Cross multiply
    355,573.13x = 490,690.87 × 194,428.28
  4. Step 4: Simplify right side
    355,573.13x = 95,404,182,606.46
  5. Step 5: Solve for x
    x = 95,404,182,606.46/355,573.13
  6. Step 6: Final answer
    x = 268,311.01

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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.