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Finding the Fourth Proportional to 270.34, 405.51 and 259.71

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Solution

The fourth proportional to 270.34, 405.51 and 259.71 is: 389.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.34 : 405.51 = 259.71 : x
  2. Step 2: Convert to fraction form
    270.34/405.51 = 259.71/x
  3. Step 3: Cross multiply
    270.34x = 405.51 × 259.71
  4. Step 4: Simplify right side
    270.34x = 105,312.51
  5. Step 5: Solve for x
    x = 105,312.51/270.34
  6. Step 6: Final answer
    x = 389.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.