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Finding the Fourth Proportional to 854.92, 1,280.93 and 623.48

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Solution

The fourth proportional to 854.92, 1,280.93 and 623.48 is: 934.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.92 : 1,280.93 = 623.48 : x
  2. Step 2: Convert to fraction form
    854.92/1,280.93 = 623.48/x
  3. Step 3: Cross multiply
    854.92x = 1,280.93 × 623.48
  4. Step 4: Simplify right side
    854.92x = 798,634.24
  5. Step 5: Solve for x
    x = 798,634.24/854.92
  6. Step 6: Final answer
    x = 934.17

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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.