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Finding the Fourth Proportional to 744.58, 1,116.93 and 282.35

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Solution

The fourth proportional to 744.58, 1,116.93 and 282.35 is: 423.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.58 : 1,116.93 = 282.35 : x
  2. Step 2: Convert to fraction form
    744.58/1,116.93 = 282.35/x
  3. Step 3: Cross multiply
    744.58x = 1,116.93 × 282.35
  4. Step 4: Simplify right side
    744.58x = 315,369.41
  5. Step 5: Solve for x
    x = 315,369.41/744.58
  6. Step 6: Final answer
    x = 423.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.