Home / 643,916.31-888,560.06-357,413.85

Finding the Fourth Proportional to 643,916.31, 888,560.06 and 357,413.85

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Solution

The fourth proportional to 643,916.31, 888,560.06 and 357,413.85 is: 493,206.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,916.31 : 888,560.06 = 357,413.85 : x
  2. Step 2: Convert to fraction form
    643,916.31/888,560.06 = 357,413.85/x
  3. Step 3: Cross multiply
    643,916.31x = 888,560.06 × 357,413.85
  4. Step 4: Simplify right side
    643,916.31x = 317,583,667,558.03
  5. Step 5: Solve for x
    x = 317,583,667,558.03/643,916.31
  6. Step 6: Final answer
    x = 493,206.43

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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.