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Finding the Fourth Proportional to 648.61, 894.93 and 368.78

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Solution

The fourth proportional to 648.61, 894.93 and 368.78 is: 508.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.61 : 894.93 = 368.78 : x
  2. Step 2: Convert to fraction form
    648.61/894.93 = 368.78/x
  3. Step 3: Cross multiply
    648.61x = 894.93 × 368.78
  4. Step 4: Simplify right side
    648.61x = 330,032.29
  5. Step 5: Solve for x
    x = 330,032.29/648.61
  6. Step 6: Final answer
    x = 508.83

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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.