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Finding the Fourth Proportional to 637.95, 880.08 and 389.22

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Solution

The fourth proportional to 637.95, 880.08 and 389.22 is: 536.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.95 : 880.08 = 389.22 : x
  2. Step 2: Convert to fraction form
    637.95/880.08 = 389.22/x
  3. Step 3: Cross multiply
    637.95x = 880.08 × 389.22
  4. Step 4: Simplify right side
    637.95x = 342,544.74
  5. Step 5: Solve for x
    x = 342,544.74/637.95
  6. Step 6: Final answer
    x = 536.95

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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.