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Finding the Fourth Proportional to 855.99, 1,283.73 and 368.92

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Solution

The fourth proportional to 855.99, 1,283.73 and 368.92 is: 553.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.99 : 1,283.73 = 368.92 : x
  2. Step 2: Convert to fraction form
    855.99/1,283.73 = 368.92/x
  3. Step 3: Cross multiply
    855.99x = 1,283.73 × 368.92
  4. Step 4: Simplify right side
    855.99x = 473,593.67
  5. Step 5: Solve for x
    x = 473,593.67/855.99
  6. Step 6: Final answer
    x = 553.27

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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.