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Finding the Fourth Proportional to 3,120,537.90, 4,378,200.90 and 3,120,537.90

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Solution

The fourth proportional to 3,120,537.90, 4,378,200.90 and 3,120,537.90 is: 4,378,200.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120,537.90 : 4,378,200.90 = 3,120,537.90 : x
  2. Step 2: Convert to fraction form
    3,120,537.90/4,378,200.90 = 3,120,537.90/x
  3. Step 3: Cross multiply
    3,120,537.90x = 4,378,200.90 × 3,120,537.90
  4. Step 4: Simplify right side
    3,120,537.90x = 13,662,341,842,264.11
  5. Step 5: Solve for x
    x = 13,662,341,842,264.11/3,120,537.90
  6. Step 6: Final answer
    x = 4,378,200.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.