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Finding the Fourth Proportional to 885.75, 1,328.97 and 423.51

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Solution

The fourth proportional to 885.75, 1,328.97 and 423.51 is: 635.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.75 : 1,328.97 = 423.51 : x
  2. Step 2: Convert to fraction form
    885.75/1,328.97 = 423.51/x
  3. Step 3: Cross multiply
    885.75x = 1,328.97 × 423.51
  4. Step 4: Simplify right side
    885.75x = 562,832.08
  5. Step 5: Solve for x
    x = 562,832.08/885.75
  6. Step 6: Final answer
    x = 635.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.