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Finding the Fourth Proportional to 1,783.46, 2,675.21 and 628.40

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Solution

The fourth proportional to 1,783.46, 2,675.21 and 628.40 is: 942.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,783.46 : 2,675.21 = 628.40 : x
  2. Step 2: Convert to fraction form
    1,783.46/2,675.21 = 628.40/x
  3. Step 3: Cross multiply
    1,783.46x = 2,675.21 × 628.40
  4. Step 4: Simplify right side
    1,783.46x = 1,681,085.45
  5. Step 5: Solve for x
    x = 1,681,085.45/1,783.46
  6. Step 6: Final answer
    x = 942.60

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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.