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Finding the Fourth Proportional to 386.77, 533.55 and 253.93

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Solution

The fourth proportional to 386.77, 533.55 and 253.93 is: 350.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.77 : 533.55 = 253.93 : x
  2. Step 2: Convert to fraction form
    386.77/533.55 = 253.93/x
  3. Step 3: Cross multiply
    386.77x = 533.55 × 253.93
  4. Step 4: Simplify right side
    386.77x = 135,486.03
  5. Step 5: Solve for x
    x = 135,486.03/386.77
  6. Step 6: Final answer
    x = 350.31

Related Problems

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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.