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Finding the Fourth Proportional to 959.60, 1,323.78 and 610.40

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Solution

The fourth proportional to 959.60, 1,323.78 and 610.40 is: 842.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.60 : 1,323.78 = 610.40 : x
  2. Step 2: Convert to fraction form
    959.60/1,323.78 = 610.40/x
  3. Step 3: Cross multiply
    959.60x = 1,323.78 × 610.40
  4. Step 4: Simplify right side
    959.60x = 808,035.31
  5. Step 5: Solve for x
    x = 808,035.31/959.60
  6. Step 6: Final answer
    x = 842.05

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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.