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Finding the Fourth Proportional to 699.69, 965.58 and 389.19

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Solution

The fourth proportional to 699.69, 965.58 and 389.19 is: 537.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.69 : 965.58 = 389.19 : x
  2. Step 2: Convert to fraction form
    699.69/965.58 = 389.19/x
  3. Step 3: Cross multiply
    699.69x = 965.58 × 389.19
  4. Step 4: Simplify right side
    699.69x = 375,794.08
  5. Step 5: Solve for x
    x = 375,794.08/699.69
  6. Step 6: Final answer
    x = 537.09

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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.