Home / 1,413.36-2,120.10-547.56

Finding the Fourth Proportional to 1,413.36, 2,120.10 and 547.56

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Solution

The fourth proportional to 1,413.36, 2,120.10 and 547.56 is: 821.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.36 : 2,120.10 = 547.56 : x
  2. Step 2: Convert to fraction form
    1,413.36/2,120.10 = 547.56/x
  3. Step 3: Cross multiply
    1,413.36x = 2,120.10 × 547.56
  4. Step 4: Simplify right side
    1,413.36x = 1,160,881.96
  5. Step 5: Solve for x
    x = 1,160,881.96/1,413.36
  6. Step 6: Final answer
    x = 821.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.