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Finding the Fourth Proportional to 684.59, 945.05 and 436.25

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Solution

The fourth proportional to 684.59, 945.05 and 436.25 is: 602.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.59 : 945.05 = 436.25 : x
  2. Step 2: Convert to fraction form
    684.59/945.05 = 436.25/x
  3. Step 3: Cross multiply
    684.59x = 945.05 × 436.25
  4. Step 4: Simplify right side
    684.59x = 412,275.88
  5. Step 5: Solve for x
    x = 412,275.88/684.59
  6. Step 6: Final answer
    x = 602.22

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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.