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Finding the Fourth Proportional to 522.18, 783.63 and 265.86

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Solution

The fourth proportional to 522.18, 783.63 and 265.86 is: 398.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.18 : 783.63 = 265.86 : x
  2. Step 2: Convert to fraction form
    522.18/783.63 = 265.86/x
  3. Step 3: Cross multiply
    522.18x = 783.63 × 265.86
  4. Step 4: Simplify right side
    522.18x = 208,335.87
  5. Step 5: Solve for x
    x = 208,335.87/522.18
  6. Step 6: Final answer
    x = 398.97

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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.