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Finding the Fourth Proportional to 207.83, 286.53 and 155.45

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Solution

The fourth proportional to 207.83, 286.53 and 155.45 is: 214.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.83 : 286.53 = 155.45 : x
  2. Step 2: Convert to fraction form
    207.83/286.53 = 155.45/x
  3. Step 3: Cross multiply
    207.83x = 286.53 × 155.45
  4. Step 4: Simplify right side
    207.83x = 44,541.22
  5. Step 5: Solve for x
    x = 44,541.22/207.83
  6. Step 6: Final answer
    x = 214.31

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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.