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Finding the Third Proportional to 313 and 358

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Solution

The third proportional to 313 and 358 is: 409.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    313 : 358 = 358 : x
  2. Step 2: Convert to fraction form
    313/358 = 358/x
  3. Step 3: Cross multiply
    313x = 358 × 358
  4. Step 4: Simplify right side
    313x = 128,164
  5. Step 5: Solve for x
    x = 128,164/313
  6. Step 6: Final answer
    x = 409.47

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These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.