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Finding the Fourth Proportional to 2,959.60, 4,439.90 and 985.34

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Solution

The fourth proportional to 2,959.60, 4,439.90 and 985.34 is: 1,478.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,959.60 : 4,439.90 = 985.34 : x
  2. Step 2: Convert to fraction form
    2,959.60/4,439.90 = 985.34/x
  3. Step 3: Cross multiply
    2,959.60x = 4,439.90 × 985.34
  4. Step 4: Simplify right side
    2,959.60x = 4,374,811.07
  5. Step 5: Solve for x
    x = 4,374,811.07/2,959.60
  6. Step 6: Final answer
    x = 1,478.18

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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.