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Finding the Fourth Proportional to 764.93, 1,055.19 and 578.07

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Solution

The fourth proportional to 764.93, 1,055.19 and 578.07 is: 797.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.93 : 1,055.19 = 578.07 : x
  2. Step 2: Convert to fraction form
    764.93/1,055.19 = 578.07/x
  3. Step 3: Cross multiply
    764.93x = 1,055.19 × 578.07
  4. Step 4: Simplify right side
    764.93x = 609,975.47
  5. Step 5: Solve for x
    x = 609,975.47/764.93
  6. Step 6: Final answer
    x = 797.42

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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.