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Finding the Fourth Proportional to 764.49, 1,055.00 and 415.17

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Solution

The fourth proportional to 764.49, 1,055.00 and 415.17 is: 572.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.49 : 1,055.00 = 415.17 : x
  2. Step 2: Convert to fraction form
    764.49/1,055.00 = 415.17/x
  3. Step 3: Cross multiply
    764.49x = 1,055.00 × 415.17
  4. Step 4: Simplify right side
    764.49x = 438,002.27
  5. Step 5: Solve for x
    x = 438,002.27/764.49
  6. Step 6: Final answer
    x = 572.93

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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.