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Finding the Fourth Proportional to 763.78, 1,054.11 and 484.03

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Solution

The fourth proportional to 763.78, 1,054.11 and 484.03 is: 668.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.78 : 1,054.11 = 484.03 : x
  2. Step 2: Convert to fraction form
    763.78/1,054.11 = 484.03/x
  3. Step 3: Cross multiply
    763.78x = 1,054.11 × 484.03
  4. Step 4: Simplify right side
    763.78x = 510,218.07
  5. Step 5: Solve for x
    x = 510,218.07/763.78
  6. Step 6: Final answer
    x = 668.02

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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.