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Finding the Fourth Proportional to 985.23, 1,476.78 and 368.52

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Solution

The fourth proportional to 985.23, 1,476.78 and 368.52 is: 552.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.23 : 1,476.78 = 368.52 : x
  2. Step 2: Convert to fraction form
    985.23/1,476.78 = 368.52/x
  3. Step 3: Cross multiply
    985.23x = 1,476.78 × 368.52
  4. Step 4: Simplify right side
    985.23x = 544,222.97
  5. Step 5: Solve for x
    x = 544,222.97/985.23
  6. Step 6: Final answer
    x = 552.38

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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.