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Finding the Fourth Proportional to 406.24, 608.68 and 391.06

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Solution

The fourth proportional to 406.24, 608.68 and 391.06 is: 585.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.24 : 608.68 = 391.06 : x
  2. Step 2: Convert to fraction form
    406.24/608.68 = 391.06/x
  3. Step 3: Cross multiply
    406.24x = 608.68 × 391.06
  4. Step 4: Simplify right side
    406.24x = 238,030.40
  5. Step 5: Solve for x
    x = 238,030.40/406.24
  6. Step 6: Final answer
    x = 585.94

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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.