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Finding the Fourth Proportional to 767.76, 1,059.34 and 436.10

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Solution

The fourth proportional to 767.76, 1,059.34 and 436.10 is: 601.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.76 : 1,059.34 = 436.10 : x
  2. Step 2: Convert to fraction form
    767.76/1,059.34 = 436.10/x
  3. Step 3: Cross multiply
    767.76x = 1,059.34 × 436.10
  4. Step 4: Simplify right side
    767.76x = 461,978.17
  5. Step 5: Solve for x
    x = 461,978.17/767.76
  6. Step 6: Final answer
    x = 601.72

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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.