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Finding the Fourth Proportional to 750.73, 1,036.48 and 485.31

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Solution

The fourth proportional to 750.73, 1,036.48 and 485.31 is: 670.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.73 : 1,036.48 = 485.31 : x
  2. Step 2: Convert to fraction form
    750.73/1,036.48 = 485.31/x
  3. Step 3: Cross multiply
    750.73x = 1,036.48 × 485.31
  4. Step 4: Simplify right side
    750.73x = 503,014.11
  5. Step 5: Solve for x
    x = 503,014.11/750.73
  6. Step 6: Final answer
    x = 670.03

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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.