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Finding the Fourth Proportional to 654.98, 903.83 and 393.14

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Solution

The fourth proportional to 654.98, 903.83 and 393.14 is: 542.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.98 : 903.83 = 393.14 : x
  2. Step 2: Convert to fraction form
    654.98/903.83 = 393.14/x
  3. Step 3: Cross multiply
    654.98x = 903.83 × 393.14
  4. Step 4: Simplify right side
    654.98x = 355,325.24
  5. Step 5: Solve for x
    x = 355,325.24/654.98
  6. Step 6: Final answer
    x = 542.50

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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.