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Finding the Fourth Proportional to 869,620.30, 1,214,980.10 and 869,620.30

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Solution

The fourth proportional to 869,620.30, 1,214,980.10 and 869,620.30 is: 1,214,980.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,620.30 : 1,214,980.10 = 869,620.30 : x
  2. Step 2: Convert to fraction form
    869,620.30/1,214,980.10 = 869,620.30/x
  3. Step 3: Cross multiply
    869,620.30x = 1,214,980.10 × 869,620.30
  4. Step 4: Simplify right side
    869,620.30x = 1,056,571,359,056.03
  5. Step 5: Solve for x
    x = 1,056,571,359,056.03/869,620.30
  6. Step 6: Final answer
    x = 1,214,980.10

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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.