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Finding the Fourth Proportional to 355,145.67, 490,068.86 and 200,122.20

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Solution

The fourth proportional to 355,145.67, 490,068.86 and 200,122.20 is: 276,150.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,145.67 : 490,068.86 = 200,122.20 : x
  2. Step 2: Convert to fraction form
    355,145.67/490,068.86 = 200,122.20/x
  3. Step 3: Cross multiply
    355,145.67x = 490,068.86 × 200,122.20
  4. Step 4: Simplify right side
    355,145.67x = 98,073,655,964.35
  5. Step 5: Solve for x
    x = 98,073,655,964.35/355,145.67
  6. Step 6: Final answer
    x = 276,150.51

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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.