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Finding the Fourth Proportional to 744.47, 1,116.80 and 379.06

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Solution

The fourth proportional to 744.47, 1,116.80 and 379.06 is: 568.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.47 : 1,116.80 = 379.06 : x
  2. Step 2: Convert to fraction form
    744.47/1,116.80 = 379.06/x
  3. Step 3: Cross multiply
    744.47x = 1,116.80 × 379.06
  4. Step 4: Simplify right side
    744.47x = 423,334.21
  5. Step 5: Solve for x
    x = 423,334.21/744.47
  6. Step 6: Final answer
    x = 568.64

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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.