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Finding the Fourth Proportional to 518,961.74, 778,475.41 and 219,386.48

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Solution

The fourth proportional to 518,961.74, 778,475.41 and 219,386.48 is: 329,093.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,961.74 : 778,475.41 = 219,386.48 : x
  2. Step 2: Convert to fraction form
    518,961.74/778,475.41 = 219,386.48/x
  3. Step 3: Cross multiply
    518,961.74x = 778,475.41 × 219,386.48
  4. Step 4: Simplify right side
    518,961.74x = 170,786,975,525.61
  5. Step 5: Solve for x
    x = 170,786,975,525.61/518,961.74
  6. Step 6: Final answer
    x = 329,093.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.