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Finding the Third Proportional to 388 and 455.50

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Solution

The third proportional to 388 and 455.50 is: 534.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    388 : 455.50 = 455.50 : x
  2. Step 2: Convert to fraction form
    388/455.50 = 455.50/x
  3. Step 3: Cross multiply
    388x = 455.50 × 455.50
  4. Step 4: Simplify right side
    388x = 207,480.25
  5. Step 5: Solve for x
    x = 207,480.25/388
  6. Step 6: Final answer
    x = 534.74

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These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.