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Finding the Fourth Proportional to 522.88, 784.32 and 306.20

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Solution

The fourth proportional to 522.88, 784.32 and 306.20 is: 459.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.88 : 784.32 = 306.20 : x
  2. Step 2: Convert to fraction form
    522.88/784.32 = 306.20/x
  3. Step 3: Cross multiply
    522.88x = 784.32 × 306.20
  4. Step 4: Simplify right side
    522.88x = 240,159.60
  5. Step 5: Solve for x
    x = 240,159.60/522.88
  6. Step 6: Final answer
    x = 459.30

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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.