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Finding the Fourth Proportional to 942.28, 1,413.07 and 479.90

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Solution

The fourth proportional to 942.28, 1,413.07 and 479.90 is: 719.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.28 : 1,413.07 = 479.90 : x
  2. Step 2: Convert to fraction form
    942.28/1,413.07 = 479.90/x
  3. Step 3: Cross multiply
    942.28x = 1,413.07 × 479.90
  4. Step 4: Simplify right side
    942.28x = 678,132.29
  5. Step 5: Solve for x
    x = 678,132.29/942.28
  6. Step 6: Final answer
    x = 719.67

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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.