Home / 1,413.92-2,120.88-440.12

Finding the Fourth Proportional to 1,413.92, 2,120.88 and 440.12

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Solution

The fourth proportional to 1,413.92, 2,120.88 and 440.12 is: 660.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.92 : 2,120.88 = 440.12 : x
  2. Step 2: Convert to fraction form
    1,413.92/2,120.88 = 440.12/x
  3. Step 3: Cross multiply
    1,413.92x = 2,120.88 × 440.12
  4. Step 4: Simplify right side
    1,413.92x = 933,441.71
  5. Step 5: Solve for x
    x = 933,441.71/1,413.92
  6. Step 6: Final answer
    x = 660.18

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Double scale
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1.5x scale

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.