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Finding the Fourth Proportional to 353,406.96, 487,635.48 and 210,202.20

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Solution

The fourth proportional to 353,406.96, 487,635.48 and 210,202.20 is: 290,039.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,406.96 : 487,635.48 = 210,202.20 : x
  2. Step 2: Convert to fraction form
    353,406.96/487,635.48 = 210,202.20/x
  3. Step 3: Cross multiply
    353,406.96x = 487,635.48 × 210,202.20
  4. Step 4: Simplify right side
    353,406.96x = 102,502,050,694.06
  5. Step 5: Solve for x
    x = 102,502,050,694.06/353,406.96
  6. Step 6: Final answer
    x = 290,039.71

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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.