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Finding the Fourth Proportional to 750.81, 1,036.07 and 419.25

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Solution

The fourth proportional to 750.81, 1,036.07 and 419.25 is: 578.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.81 : 1,036.07 = 419.25 : x
  2. Step 2: Convert to fraction form
    750.81/1,036.07 = 419.25/x
  3. Step 3: Cross multiply
    750.81x = 1,036.07 × 419.25
  4. Step 4: Simplify right side
    750.81x = 434,374.34
  5. Step 5: Solve for x
    x = 434,374.34/750.81
  6. Step 6: Final answer
    x = 578.54

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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.