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Finding the Fourth Proportional to 867,986.10, 1,217,979.90 and 867,986.10

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Solution

The fourth proportional to 867,986.10, 1,217,979.90 and 867,986.10 is: 1,217,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,986.10 : 1,217,979.90 = 867,986.10 : x
  2. Step 2: Convert to fraction form
    867,986.10/1,217,979.90 = 867,986.10/x
  3. Step 3: Cross multiply
    867,986.10x = 1,217,979.90 × 867,986.10
  4. Step 4: Simplify right side
    867,986.10x = 1,057,189,623,279.39
  5. Step 5: Solve for x
    x = 1,057,189,623,279.39/867,986.10
  6. Step 6: Final answer
    x = 1,217,979.90

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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.