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Finding the Fourth Proportional to 1,965.35, 2,948.39 and 578.69

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Solution

The fourth proportional to 1,965.35, 2,948.39 and 578.69 is: 868.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.35 : 2,948.39 = 578.69 : x
  2. Step 2: Convert to fraction form
    1,965.35/2,948.39 = 578.69/x
  3. Step 3: Cross multiply
    1,965.35x = 2,948.39 × 578.69
  4. Step 4: Simplify right side
    1,965.35x = 1,706,186.17
  5. Step 5: Solve for x
    x = 1,706,186.17/1,965.35
  6. Step 6: Final answer
    x = 868.14

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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.