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Finding the Fourth Proportional to 684.47, 1,026.86 and 251.63

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Solution

The fourth proportional to 684.47, 1,026.86 and 251.63 is: 377.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.47 : 1,026.86 = 251.63 : x
  2. Step 2: Convert to fraction form
    684.47/1,026.86 = 251.63/x
  3. Step 3: Cross multiply
    684.47x = 1,026.86 × 251.63
  4. Step 4: Simplify right side
    684.47x = 258,388.78
  5. Step 5: Solve for x
    x = 258,388.78/684.47
  6. Step 6: Final answer
    x = 377.50

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Double scale
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1.5x scale

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.