Home / 2,118,192.78-3,175,503.39-919,211.88

Finding the Fourth Proportional to 2,118,192.78, 3,175,503.39 and 919,211.88

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Solution

The fourth proportional to 2,118,192.78, 3,175,503.39 and 919,211.88 is: 1,378,042.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118,192.78 : 3,175,503.39 = 919,211.88 : x
  2. Step 2: Convert to fraction form
    2,118,192.78/3,175,503.39 = 919,211.88/x
  3. Step 3: Cross multiply
    2,118,192.78x = 3,175,503.39 × 919,211.88
  4. Step 4: Simplify right side
    2,118,192.78x = 2,918,960,441,068.27
  5. Step 5: Solve for x
    x = 2,918,960,441,068.27/2,118,192.78
  6. Step 6: Final answer
    x = 1,378,042.86

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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.