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Finding the Fourth Proportional to 298.68, 412.40 and 188.32

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Solution

The fourth proportional to 298.68, 412.40 and 188.32 is: 260.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.68 : 412.40 = 188.32 : x
  2. Step 2: Convert to fraction form
    298.68/412.40 = 188.32/x
  3. Step 3: Cross multiply
    298.68x = 412.40 × 188.32
  4. Step 4: Simplify right side
    298.68x = 77,663.17
  5. Step 5: Solve for x
    x = 77,663.17/298.68
  6. Step 6: Final answer
    x = 260.02

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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.