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Finding the Fourth Proportional to 2,779.60, 4,168.94 and 930.70

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Solution

The fourth proportional to 2,779.60, 4,168.94 and 930.70 is: 1,395.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,779.60 : 4,168.94 = 930.70 : x
  2. Step 2: Convert to fraction form
    2,779.60/4,168.94 = 930.70/x
  3. Step 3: Cross multiply
    2,779.60x = 4,168.94 × 930.70
  4. Step 4: Simplify right side
    2,779.60x = 3,880,032.46
  5. Step 5: Solve for x
    x = 3,880,032.46/2,779.60
  6. Step 6: Final answer
    x = 1,395.90

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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.