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Finding the Fourth Proportional to 930.51, 1,284.13 and 628.08

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Solution

The fourth proportional to 930.51, 1,284.13 and 628.08 is: 866.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.51 : 1,284.13 = 628.08 : x
  2. Step 2: Convert to fraction form
    930.51/1,284.13 = 628.08/x
  3. Step 3: Cross multiply
    930.51x = 1,284.13 × 628.08
  4. Step 4: Simplify right side
    930.51x = 806,536.37
  5. Step 5: Solve for x
    x = 806,536.37/930.51
  6. Step 6: Final answer
    x = 866.77

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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.