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Finding the Fourth Proportional to 869,107.40, 1,217,579.80 and 869,107.40

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Solution

The fourth proportional to 869,107.40, 1,217,579.80 and 869,107.40 is: 1,217,579.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,107.40 : 1,217,579.80 = 869,107.40 : x
  2. Step 2: Convert to fraction form
    869,107.40/1,217,579.80 = 869,107.40/x
  3. Step 3: Cross multiply
    869,107.40x = 1,217,579.80 × 869,107.40
  4. Step 4: Simplify right side
    869,107.40x = 1,058,207,614,270.52
  5. Step 5: Solve for x
    x = 1,058,207,614,270.52/869,107.40
  6. Step 6: Final answer
    x = 1,217,579.80

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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.