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Finding the Fourth Proportional to 765.08, 1,055.66 and 450.36

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Solution

The fourth proportional to 765.08, 1,055.66 and 450.36 is: 621.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    765.08 : 1,055.66 = 450.36 : x
  2. Step 2: Convert to fraction form
    765.08/1,055.66 = 450.36/x
  3. Step 3: Cross multiply
    765.08x = 1,055.66 × 450.36
  4. Step 4: Simplify right side
    765.08x = 475,427.04
  5. Step 5: Solve for x
    x = 475,427.04/765.08
  6. Step 6: Final answer
    x = 621.41

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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.