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Finding the Fourth Proportional to 923.45, 1,274.63 and 608.95

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Solution

The fourth proportional to 923.45, 1,274.63 and 608.95 is: 840.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.45 : 1,274.63 = 608.95 : x
  2. Step 2: Convert to fraction form
    923.45/1,274.63 = 608.95/x
  3. Step 3: Cross multiply
    923.45x = 1,274.63 × 608.95
  4. Step 4: Simplify right side
    923.45x = 776,185.94
  5. Step 5: Solve for x
    x = 776,185.94/923.45
  6. Step 6: Final answer
    x = 840.53

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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.