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Finding the Fourth Proportional to 699.02, 964.61 and 388.50

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Solution

The fourth proportional to 699.02, 964.61 and 388.50 is: 536.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.02 : 964.61 = 388.50 : x
  2. Step 2: Convert to fraction form
    699.02/964.61 = 388.50/x
  3. Step 3: Cross multiply
    699.02x = 964.61 × 388.50
  4. Step 4: Simplify right side
    699.02x = 374,750.99
  5. Step 5: Solve for x
    x = 374,750.99/699.02
  6. Step 6: Final answer
    x = 536.11

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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.