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Finding the Fourth Proportional to 1,413.32, 2,119.64 and 632.88

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Solution

The fourth proportional to 1,413.32, 2,119.64 and 632.88 is: 949.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.32 : 2,119.64 = 632.88 : x
  2. Step 2: Convert to fraction form
    1,413.32/2,119.64 = 632.88/x
  3. Step 3: Cross multiply
    1,413.32x = 2,119.64 × 632.88
  4. Step 4: Simplify right side
    1,413.32x = 1,341,477.76
  5. Step 5: Solve for x
    x = 1,341,477.76/1,413.32
  6. Step 6: Final answer
    x = 949.17

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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.