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Finding the Fourth Proportional to 751.49, 1,036.98 and 486.32

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Solution

The fourth proportional to 751.49, 1,036.98 and 486.32 is: 671.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.49 : 1,036.98 = 486.32 : x
  2. Step 2: Convert to fraction form
    751.49/1,036.98 = 486.32/x
  3. Step 3: Cross multiply
    751.49x = 1,036.98 × 486.32
  4. Step 4: Simplify right side
    751.49x = 504,304.11
  5. Step 5: Solve for x
    x = 504,304.11/751.49
  6. Step 6: Final answer
    x = 671.07

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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.