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Finding the Fourth Proportional to 294, 405.28 and 210.88

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Solution

The fourth proportional to 294, 405.28 and 210.88 is: 290.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    294 : 405.28 = 210.88 : x
  2. Step 2: Convert to fraction form
    294/405.28 = 210.88/x
  3. Step 3: Cross multiply
    294x = 405.28 × 210.88
  4. Step 4: Simplify right side
    294x = 85,465.45
  5. Step 5: Solve for x
    x = 85,465.45/294
  6. Step 6: Final answer
    x = 290.70

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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.