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Finding the Fourth Proportional to 370,881.45, 511,881.93 and 217,919.61

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Solution

The fourth proportional to 370,881.45, 511,881.93 and 217,919.61 is: 300,767.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,881.45 : 511,881.93 = 217,919.61 : x
  2. Step 2: Convert to fraction form
    370,881.45/511,881.93 = 217,919.61/x
  3. Step 3: Cross multiply
    370,881.45x = 511,881.93 × 217,919.61
  4. Step 4: Simplify right side
    370,881.45x = 111,549,110,551.65
  5. Step 5: Solve for x
    x = 111,549,110,551.65/370,881.45
  6. Step 6: Final answer
    x = 300,767.56

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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.