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Finding the Fourth Proportional to 612.89, 917.94 and 368.90

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Solution

The fourth proportional to 612.89, 917.94 and 368.90 is: 552.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.89 : 917.94 = 368.90 : x
  2. Step 2: Convert to fraction form
    612.89/917.94 = 368.90/x
  3. Step 3: Cross multiply
    612.89x = 917.94 × 368.90
  4. Step 4: Simplify right side
    612.89x = 338,623.48
  5. Step 5: Solve for x
    x = 338,623.48/612.89
  6. Step 6: Final answer
    x = 552.51

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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.