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Finding the Fourth Proportional to 684.50, 1,026.36 and 410.76

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Solution

The fourth proportional to 684.50, 1,026.36 and 410.76 is: 615.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.50 : 1,026.36 = 410.76 : x
  2. Step 2: Convert to fraction form
    684.50/1,026.36 = 410.76/x
  3. Step 3: Cross multiply
    684.50x = 1,026.36 × 410.76
  4. Step 4: Simplify right side
    684.50x = 421,587.63
  5. Step 5: Solve for x
    x = 421,587.63/684.50
  6. Step 6: Final answer
    x = 615.91

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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.