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Finding the Fourth Proportional to 684.34, 1,026.50 and 548.24

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Solution

The fourth proportional to 684.34, 1,026.50 and 548.24 is: 822.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.34 : 1,026.50 = 548.24 : x
  2. Step 2: Convert to fraction form
    684.34/1,026.50 = 548.24/x
  3. Step 3: Cross multiply
    684.34x = 1,026.50 × 548.24
  4. Step 4: Simplify right side
    684.34x = 562,768.36
  5. Step 5: Solve for x
    x = 562,768.36/684.34
  6. Step 6: Final answer
    x = 822.35

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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.