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Finding the Fourth Proportional to 751.38, 1,036.37 and 689.41

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Solution

The fourth proportional to 751.38, 1,036.37 and 689.41 is: 950.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.38 : 1,036.37 = 689.41 : x
  2. Step 2: Convert to fraction form
    751.38/1,036.37 = 689.41/x
  3. Step 3: Cross multiply
    751.38x = 1,036.37 × 689.41
  4. Step 4: Simplify right side
    751.38x = 714,483.84
  5. Step 5: Solve for x
    x = 714,483.84/751.38
  6. Step 6: Final answer
    x = 950.90

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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.