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Finding the Fourth Proportional to 928.99, 1,282.03 and 556.36

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Solution

The fourth proportional to 928.99, 1,282.03 and 556.36 is: 767.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.99 : 1,282.03 = 556.36 : x
  2. Step 2: Convert to fraction form
    928.99/1,282.03 = 556.36/x
  3. Step 3: Cross multiply
    928.99x = 1,282.03 × 556.36
  4. Step 4: Simplify right side
    928.99x = 713,270.21
  5. Step 5: Solve for x
    x = 713,270.21/928.99
  6. Step 6: Final answer
    x = 767.79

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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.