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Finding the Fourth Proportional to 1,903.46, 2,855.35 and 670.76

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Solution

The fourth proportional to 1,903.46, 2,855.35 and 670.76 is: 1,006.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,903.46 : 2,855.35 = 670.76 : x
  2. Step 2: Convert to fraction form
    1,903.46/2,855.35 = 670.76/x
  3. Step 3: Cross multiply
    1,903.46x = 2,855.35 × 670.76
  4. Step 4: Simplify right side
    1,903.46x = 1,915,254.57
  5. Step 5: Solve for x
    x = 1,915,254.57/1,903.46
  6. Step 6: Final answer
    x = 1,006.20

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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.