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Finding the Fourth Proportional to 752.39, 1,036.40 and 634.23

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Solution

The fourth proportional to 752.39, 1,036.40 and 634.23 is: 873.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.39 : 1,036.40 = 634.23 : x
  2. Step 2: Convert to fraction form
    752.39/1,036.40 = 634.23/x
  3. Step 3: Cross multiply
    752.39x = 1,036.40 × 634.23
  4. Step 4: Simplify right side
    752.39x = 657,312.80
  5. Step 5: Solve for x
    x = 657,312.80/752.39
  6. Step 6: Final answer
    x = 873.63

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Double scale
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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.