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Finding the Fourth Proportional to 1,189,383.84, 1,640,947.68 and 679,723.20

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Solution

The fourth proportional to 1,189,383.84, 1,640,947.68 and 679,723.20 is: 937,788.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,383.84 : 1,640,947.68 = 679,723.20 : x
  2. Step 2: Convert to fraction form
    1,189,383.84/1,640,947.68 = 679,723.20/x
  3. Step 3: Cross multiply
    1,189,383.84x = 1,640,947.68 × 679,723.20
  4. Step 4: Simplify right side
    1,189,383.84x = 1,115,390,208,082.18
  5. Step 5: Solve for x
    x = 1,115,390,208,082.18/1,189,383.84
  6. Step 6: Final answer
    x = 937,788.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.