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Finding the Fourth Proportional to 645.13, 891.00 and 436.17

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Solution

The fourth proportional to 645.13, 891.00 and 436.17 is: 602.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.13 : 891.00 = 436.17 : x
  2. Step 2: Convert to fraction form
    645.13/891.00 = 436.17/x
  3. Step 3: Cross multiply
    645.13x = 891.00 × 436.17
  4. Step 4: Simplify right side
    645.13x = 388,626.33
  5. Step 5: Solve for x
    x = 388,626.33/645.13
  6. Step 6: Final answer
    x = 602.40

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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.