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Finding the Fourth Proportional to 846.94, 1,270.79 and 538.71

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Solution

The fourth proportional to 846.94, 1,270.79 and 538.71 is: 808.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.94 : 1,270.79 = 538.71 : x
  2. Step 2: Convert to fraction form
    846.94/1,270.79 = 538.71/x
  3. Step 3: Cross multiply
    846.94x = 1,270.79 × 538.71
  4. Step 4: Simplify right side
    846.94x = 684,587.28
  5. Step 5: Solve for x
    x = 684,587.28/846.94
  6. Step 6: Final answer
    x = 808.31

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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.