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Finding the Fourth Proportional to 764.15, 1,054.76 and 484.29

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Solution

The fourth proportional to 764.15, 1,054.76 and 484.29 is: 668.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.15 : 1,054.76 = 484.29 : x
  2. Step 2: Convert to fraction form
    764.15/1,054.76 = 484.29/x
  3. Step 3: Cross multiply
    764.15x = 1,054.76 × 484.29
  4. Step 4: Simplify right side
    764.15x = 510,807.30
  5. Step 5: Solve for x
    x = 510,807.30/764.15
  6. Step 6: Final answer
    x = 668.47

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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.