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Finding the Fourth Proportional to 293.15, 405.32 and 256.70

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Solution

The fourth proportional to 293.15, 405.32 and 256.70 is: 354.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.15 : 405.32 = 256.70 : x
  2. Step 2: Convert to fraction form
    293.15/405.32 = 256.70/x
  3. Step 3: Cross multiply
    293.15x = 405.32 × 256.70
  4. Step 4: Simplify right side
    293.15x = 104,045.64
  5. Step 5: Solve for x
    x = 104,045.64/293.15
  6. Step 6: Final answer
    x = 354.92

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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.