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Finding the Fourth Proportional to 645.91, 892.08 and 436.95

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Solution

The fourth proportional to 645.91, 892.08 and 436.95 is: 603.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.91 : 892.08 = 436.95 : x
  2. Step 2: Convert to fraction form
    645.91/892.08 = 436.95/x
  3. Step 3: Cross multiply
    645.91x = 892.08 × 436.95
  4. Step 4: Simplify right side
    645.91x = 389,794.36
  5. Step 5: Solve for x
    x = 389,794.36/645.91
  6. Step 6: Final answer
    x = 603.48

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1.5x scale

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.