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Finding the Fourth Proportional to 265.90, 396.50 and 247.40

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Solution

The fourth proportional to 265.90, 396.50 and 247.40 is: 368.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.90 : 396.50 = 247.40 : x
  2. Step 2: Convert to fraction form
    265.90/396.50 = 247.40/x
  3. Step 3: Cross multiply
    265.90x = 396.50 × 247.40
  4. Step 4: Simplify right side
    265.90x = 98,095.38
  5. Step 5: Solve for x
    x = 98,095.38/265.90
  6. Step 6: Final answer
    x = 368.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.