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Finding the Fourth Proportional to 5,215.67, 7,818.03 and 2,440

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Solution

The fourth proportional to 5,215.67, 7,818.03 and 2,440 is: 3,657.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.67 : 7,818.03 = 2,440 : x
  2. Step 2: Convert to fraction form
    5,215.67/7,818.03 = 2,440/x
  3. Step 3: Cross multiply
    5,215.67x = 7,818.03 × 2,440
  4. Step 4: Simplify right side
    5,215.67x = 19,075,993.20
  5. Step 5: Solve for x
    x = 19,075,993.20/5,215.67
  6. Step 6: Final answer
    x = 3,657.44

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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.