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Finding the Fourth Proportional to 763.78, 1,054 and 414.46

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Solution

The fourth proportional to 763.78, 1,054 and 414.46 is: 571.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.78 : 1,054 = 414.46 : x
  2. Step 2: Convert to fraction form
    763.78/1,054 = 414.46/x
  3. Step 3: Cross multiply
    763.78x = 1,054 × 414.46
  4. Step 4: Simplify right side
    763.78x = 436,840.84
  5. Step 5: Solve for x
    x = 436,840.84/763.78
  6. Step 6: Final answer
    x = 571.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.