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Finding the Fourth Proportional to 518,602.50, 778,209.93 and 219,063.69

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Solution

The fourth proportional to 518,602.50, 778,209.93 and 219,063.69 is: 328,724.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,602.50 : 778,209.93 = 219,063.69 : x
  2. Step 2: Convert to fraction form
    518,602.50/778,209.93 = 219,063.69/x
  3. Step 3: Cross multiply
    518,602.50x = 778,209.93 × 219,063.69
  4. Step 4: Simplify right side
    518,602.50x = 170,477,538,860.44
  5. Step 5: Solve for x
    x = 170,477,538,860.44/518,602.50
  6. Step 6: Final answer
    x = 328,724.87

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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.