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Finding the Fourth Proportional to 699.39, 965.14 and 384.65

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Solution

The fourth proportional to 699.39, 965.14 and 384.65 is: 530.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.39 : 965.14 = 384.65 : x
  2. Step 2: Convert to fraction form
    699.39/965.14 = 384.65/x
  3. Step 3: Cross multiply
    699.39x = 965.14 × 384.65
  4. Step 4: Simplify right side
    699.39x = 371,241.11
  5. Step 5: Solve for x
    x = 371,241.11/699.39
  6. Step 6: Final answer
    x = 530.81

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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.