Home / 3,215-4,436.70-1,818.20

Finding the Fourth Proportional to 3,215, 4,436.70 and 1,818.20

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Solution

The fourth proportional to 3,215, 4,436.70 and 1,818.20 is: 2,509.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215 : 4,436.70 = 1,818.20 : x
  2. Step 2: Convert to fraction form
    3,215/4,436.70 = 1,818.20/x
  3. Step 3: Cross multiply
    3,215x = 4,436.70 × 1,818.20
  4. Step 4: Simplify right side
    3,215x = 8,066,807.94
  5. Step 5: Solve for x
    x = 8,066,807.94/3,215
  6. Step 6: Final answer
    x = 2,509.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.