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Finding the Fourth Proportional to 744.58, 1,117.23 and 306.15

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Solution

The fourth proportional to 744.58, 1,117.23 and 306.15 is: 459.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.58 : 1,117.23 = 306.15 : x
  2. Step 2: Convert to fraction form
    744.58/1,117.23 = 306.15/x
  3. Step 3: Cross multiply
    744.58x = 1,117.23 × 306.15
  4. Step 4: Simplify right side
    744.58x = 342,045.35
  5. Step 5: Solve for x
    x = 342,045.35/744.58
  6. Step 6: Final answer
    x = 459.38

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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.