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Finding the Fourth Proportional to 764.92, 1,055.40 and 433.28

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Solution

The fourth proportional to 764.92, 1,055.40 and 433.28 is: 597.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.92 : 1,055.40 = 433.28 : x
  2. Step 2: Convert to fraction form
    764.92/1,055.40 = 433.28/x
  3. Step 3: Cross multiply
    764.92x = 1,055.40 × 433.28
  4. Step 4: Simplify right side
    764.92x = 457,283.71
  5. Step 5: Solve for x
    x = 457,283.71/764.92
  6. Step 6: Final answer
    x = 597.82

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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.