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Finding the Fourth Proportional to 522.81, 783.72 and 198.21

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Solution

The fourth proportional to 522.81, 783.72 and 198.21 is: 297.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.81 : 783.72 = 198.21 : x
  2. Step 2: Convert to fraction form
    522.81/783.72 = 198.21/x
  3. Step 3: Cross multiply
    522.81x = 783.72 × 198.21
  4. Step 4: Simplify right side
    522.81x = 155,341.14
  5. Step 5: Solve for x
    x = 155,341.14/522.81
  6. Step 6: Final answer
    x = 297.13

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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.