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Finding the Fourth Proportional to 885.66, 1,329.42 and 423.83

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Solution

The fourth proportional to 885.66, 1,329.42 and 423.83 is: 636.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.66 : 1,329.42 = 423.83 : x
  2. Step 2: Convert to fraction form
    885.66/1,329.42 = 423.83/x
  3. Step 3: Cross multiply
    885.66x = 1,329.42 × 423.83
  4. Step 4: Simplify right side
    885.66x = 563,441.43
  5. Step 5: Solve for x
    x = 563,441.43/885.66
  6. Step 6: Final answer
    x = 636.18

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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.