Home / 691,829.40-954,579.42-420,040.40

Finding the Fourth Proportional to 691,829.40, 954,579.42 and 420,040.40

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Solution

The fourth proportional to 691,829.40, 954,579.42 and 420,040.40 is: 579,567.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,829.40 : 954,579.42 = 420,040.40 : x
  2. Step 2: Convert to fraction form
    691,829.40/954,579.42 = 420,040.40/x
  3. Step 3: Cross multiply
    691,829.40x = 954,579.42 × 420,040.40
  4. Step 4: Simplify right side
    691,829.40x = 400,961,921,408.57
  5. Step 5: Solve for x
    x = 400,961,921,408.57/691,829.40
  6. Step 6: Final answer
    x = 579,567.62

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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.