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Finding the Fourth Proportional to 2,780.64, 4,168.05 and 930.23

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Solution

The fourth proportional to 2,780.64, 4,168.05 and 930.23 is: 1,394.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.64 : 4,168.05 = 930.23 : x
  2. Step 2: Convert to fraction form
    2,780.64/4,168.05 = 930.23/x
  3. Step 3: Cross multiply
    2,780.64x = 4,168.05 × 930.23
  4. Step 4: Simplify right side
    2,780.64x = 3,877,240.37
  5. Step 5: Solve for x
    x = 3,877,240.37/2,780.64
  6. Step 6: Final answer
    x = 1,394.37

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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.