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Finding the Fourth Proportional to 412.95, 569.67 and 288.81

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Solution

The fourth proportional to 412.95, 569.67 and 288.81 is: 398.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.95 : 569.67 = 288.81 : x
  2. Step 2: Convert to fraction form
    412.95/569.67 = 288.81/x
  3. Step 3: Cross multiply
    412.95x = 569.67 × 288.81
  4. Step 4: Simplify right side
    412.95x = 164,526.39
  5. Step 5: Solve for x
    x = 164,526.39/412.95
  6. Step 6: Final answer
    x = 398.42

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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.