Home / 1,516.86-2,275.17-421.25

Finding the Fourth Proportional to 1,516.86, 2,275.17 and 421.25

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Solution

The fourth proportional to 1,516.86, 2,275.17 and 421.25 is: 631.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,516.86 : 2,275.17 = 421.25 : x
  2. Step 2: Convert to fraction form
    1,516.86/2,275.17 = 421.25/x
  3. Step 3: Cross multiply
    1,516.86x = 2,275.17 × 421.25
  4. Step 4: Simplify right side
    1,516.86x = 958,413.26
  5. Step 5: Solve for x
    x = 958,413.26/1,516.86
  6. Step 6: Final answer
    x = 631.84

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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.