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Finding the Fourth Proportional to 764.70, 1,055.28 and 433.13

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Solution

The fourth proportional to 764.70, 1,055.28 and 433.13 is: 597.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.70 : 1,055.28 = 433.13 : x
  2. Step 2: Convert to fraction form
    764.70/1,055.28 = 433.13/x
  3. Step 3: Cross multiply
    764.70x = 1,055.28 × 433.13
  4. Step 4: Simplify right side
    764.70x = 457,065.98
  5. Step 5: Solve for x
    x = 457,065.98/764.70
  6. Step 6: Final answer
    x = 597.71

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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.