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Finding the Fourth Proportional to 374.81, 515.63 and 287.33

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Solution

The fourth proportional to 374.81, 515.63 and 287.33 is: 395.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.81 : 515.63 = 287.33 : x
  2. Step 2: Convert to fraction form
    374.81/515.63 = 287.33/x
  3. Step 3: Cross multiply
    374.81x = 515.63 × 287.33
  4. Step 4: Simplify right side
    374.81x = 148,154.11
  5. Step 5: Solve for x
    x = 148,154.11/374.81
  6. Step 6: Final answer
    x = 395.28

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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.