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Finding the Fourth Proportional to 355,565.32, 490,639.96 and 210,375.56

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Solution

The fourth proportional to 355,565.32, 490,639.96 and 210,375.56 is: 290,294.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,565.32 : 490,639.96 = 210,375.56 : x
  2. Step 2: Convert to fraction form
    355,565.32/490,639.96 = 210,375.56/x
  3. Step 3: Cross multiply
    355,565.32x = 490,639.96 × 210,375.56
  4. Step 4: Simplify right side
    355,565.32x = 103,218,653,364.24
  5. Step 5: Solve for x
    x = 103,218,653,364.24/355,565.32
  6. Step 6: Final answer
    x = 290,294.49

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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.