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Finding the Fourth Proportional to 615.61, 923.60 and 368.78

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Solution

The fourth proportional to 615.61, 923.60 and 368.78 is: 553.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.61 : 923.60 = 368.78 : x
  2. Step 2: Convert to fraction form
    615.61/923.60 = 368.78/x
  3. Step 3: Cross multiply
    615.61x = 923.60 × 368.78
  4. Step 4: Simplify right side
    615.61x = 340,601.51
  5. Step 5: Solve for x
    x = 340,601.51/615.61
  6. Step 6: Final answer
    x = 553.28

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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.