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Finding the Fourth Proportional to 585.90, 808.86 and 428.37

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Solution

The fourth proportional to 585.90, 808.86 and 428.37 is: 591.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.90 : 808.86 = 428.37 : x
  2. Step 2: Convert to fraction form
    585.90/808.86 = 428.37/x
  3. Step 3: Cross multiply
    585.90x = 808.86 × 428.37
  4. Step 4: Simplify right side
    585.90x = 346,491.36
  5. Step 5: Solve for x
    x = 346,491.36/585.90
  6. Step 6: Final answer
    x = 591.38

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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.