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Finding the Fourth Proportional to 2,346.61, 3,518.78 and 959.40

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Solution

The fourth proportional to 2,346.61, 3,518.78 and 959.40 is: 1,438.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,346.61 : 3,518.78 = 959.40 : x
  2. Step 2: Convert to fraction form
    2,346.61/3,518.78 = 959.40/x
  3. Step 3: Cross multiply
    2,346.61x = 3,518.78 × 959.40
  4. Step 4: Simplify right side
    2,346.61x = 3,375,911.13
  5. Step 5: Solve for x
    x = 3,375,911.13/2,346.61
  6. Step 6: Final answer
    x = 1,438.63

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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.