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Finding the Fourth Proportional to 3,215, 4,436.70 and 1,817.76

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Solution

The fourth proportional to 3,215, 4,436.70 and 1,817.76 is: 2,508.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215 : 4,436.70 = 1,817.76 : x
  2. Step 2: Convert to fraction form
    3,215/4,436.70 = 1,817.76/x
  3. Step 3: Cross multiply
    3,215x = 4,436.70 × 1,817.76
  4. Step 4: Simplify right side
    3,215x = 8,064,855.79
  5. Step 5: Solve for x
    x = 8,064,855.79/3,215
  6. Step 6: Final answer
    x = 2,508.51

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1.5x scale

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.