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Finding the Fourth Proportional to 588.78, 812.55 and 355.98

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Solution

The fourth proportional to 588.78, 812.55 and 355.98 is: 491.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.78 : 812.55 = 355.98 : x
  2. Step 2: Convert to fraction form
    588.78/812.55 = 355.98/x
  3. Step 3: Cross multiply
    588.78x = 812.55 × 355.98
  4. Step 4: Simplify right side
    588.78x = 289,251.55
  5. Step 5: Solve for x
    x = 289,251.55/588.78
  6. Step 6: Final answer
    x = 491.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.