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Finding the Fourth Proportional to 846.69, 1,269.90 and 269.70

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Solution

The fourth proportional to 846.69, 1,269.90 and 269.70 is: 404.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.69 : 1,269.90 = 269.70 : x
  2. Step 2: Convert to fraction form
    846.69/1,269.90 = 269.70/x
  3. Step 3: Cross multiply
    846.69x = 1,269.90 × 269.70
  4. Step 4: Simplify right side
    846.69x = 342,492.03
  5. Step 5: Solve for x
    x = 342,492.03/846.69
  6. Step 6: Final answer
    x = 404.51

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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.