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Finding the Fourth Proportional to 3,121,880.40, 4,380,080.40 and 3,121,880.40

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Solution

The fourth proportional to 3,121,880.40, 4,380,080.40 and 3,121,880.40 is: 4,380,080.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121,880.40 : 4,380,080.40 = 3,121,880.40 : x
  2. Step 2: Convert to fraction form
    3,121,880.40/4,380,080.40 = 3,121,880.40/x
  3. Step 3: Cross multiply
    3,121,880.40x = 4,380,080.40 × 3,121,880.40
  4. Step 4: Simplify right side
    3,121,880.40x = 13,674,087,151,184.16
  5. Step 5: Solve for x
    x = 13,674,087,151,184.16/3,121,880.40
  6. Step 6: Final answer
    x = 4,380,080.40

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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.