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Finding the Fourth Proportional to 522.74, 784.67 and 393.11

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Solution

The fourth proportional to 522.74, 784.67 and 393.11 is: 590.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.74 : 784.67 = 393.11 : x
  2. Step 2: Convert to fraction form
    522.74/784.67 = 393.11/x
  3. Step 3: Cross multiply
    522.74x = 784.67 × 393.11
  4. Step 4: Simplify right side
    522.74x = 308,457.70
  5. Step 5: Solve for x
    x = 308,457.70/522.74
  6. Step 6: Final answer
    x = 590.08

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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.