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Finding the Fourth Proportional to 522.90, 784.68 and 198.30

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Solution

The fourth proportional to 522.90, 784.68 and 198.30 is: 297.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.90 : 784.68 = 198.30 : x
  2. Step 2: Convert to fraction form
    522.90/784.68 = 198.30/x
  3. Step 3: Cross multiply
    522.90x = 784.68 × 198.30
  4. Step 4: Simplify right side
    522.90x = 155,602.04
  5. Step 5: Solve for x
    x = 155,602.04/522.90
  6. Step 6: Final answer
    x = 297.58

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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.