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Finding the Fourth Proportional to 356.01, 489.83 and 309.26

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Solution

The fourth proportional to 356.01, 489.83 and 309.26 is: 425.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.01 : 489.83 = 309.26 : x
  2. Step 2: Convert to fraction form
    356.01/489.83 = 309.26/x
  3. Step 3: Cross multiply
    356.01x = 489.83 × 309.26
  4. Step 4: Simplify right side
    356.01x = 151,480.83
  5. Step 5: Solve for x
    x = 151,480.83/356.01
  6. Step 6: Final answer
    x = 425.50

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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.