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Finding the Fourth Proportional to 752.69, 1,036.83 and 628.31

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Solution

The fourth proportional to 752.69, 1,036.83 and 628.31 is: 865.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.69 : 1,036.83 = 628.31 : x
  2. Step 2: Convert to fraction form
    752.69/1,036.83 = 628.31/x
  3. Step 3: Cross multiply
    752.69x = 1,036.83 × 628.31
  4. Step 4: Simplify right side
    752.69x = 651,450.66
  5. Step 5: Solve for x
    x = 651,450.66/752.69
  6. Step 6: Final answer
    x = 865.50

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1.5x scale

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.