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Finding the Fourth Proportional to 767.40, 1,059.13 and 435.76

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Solution

The fourth proportional to 767.40, 1,059.13 and 435.76 is: 601.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.40 : 1,059.13 = 435.76 : x
  2. Step 2: Convert to fraction form
    767.40/1,059.13 = 435.76/x
  3. Step 3: Cross multiply
    767.40x = 1,059.13 × 435.76
  4. Step 4: Simplify right side
    767.40x = 461,519.01
  5. Step 5: Solve for x
    x = 461,519.01/767.40
  6. Step 6: Final answer
    x = 601.41

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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.