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Finding the Fourth Proportional to 1,778.19, 2,667.28 and 623.67

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Solution

The fourth proportional to 1,778.19, 2,667.28 and 623.67 is: 935.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.19 : 2,667.28 = 623.67 : x
  2. Step 2: Convert to fraction form
    1,778.19/2,667.28 = 623.67/x
  3. Step 3: Cross multiply
    1,778.19x = 2,667.28 × 623.67
  4. Step 4: Simplify right side
    1,778.19x = 1,663,502.52
  5. Step 5: Solve for x
    x = 1,663,502.52/1,778.19
  6. Step 6: Final answer
    x = 935.50

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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.