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Finding the Fourth Proportional to 2,415.59, 3,621.62 and 771.19

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Solution

The fourth proportional to 2,415.59, 3,621.62 and 771.19 is: 1,156.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,415.59 : 3,621.62 = 771.19 : x
  2. Step 2: Convert to fraction form
    2,415.59/3,621.62 = 771.19/x
  3. Step 3: Cross multiply
    2,415.59x = 3,621.62 × 771.19
  4. Step 4: Simplify right side
    2,415.59x = 2,792,953.27
  5. Step 5: Solve for x
    x = 2,792,953.27/2,415.59
  6. Step 6: Final answer
    x = 1,156.22

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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.