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Finding the Fourth Proportional to 522.76, 783 and 400.12

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Solution

The fourth proportional to 522.76, 783 and 400.12 is: 599.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.76 : 783 = 400.12 : x
  2. Step 2: Convert to fraction form
    522.76/783 = 400.12/x
  3. Step 3: Cross multiply
    522.76x = 783 × 400.12
  4. Step 4: Simplify right side
    522.76x = 313,293.96
  5. Step 5: Solve for x
    x = 313,293.96/522.76
  6. Step 6: Final answer
    x = 599.31

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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.