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Finding the Fourth Proportional to 1,671.98, 2,506.19 and 891.50

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Solution

The fourth proportional to 1,671.98, 2,506.19 and 891.50 is: 1,336.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,671.98 : 2,506.19 = 891.50 : x
  2. Step 2: Convert to fraction form
    1,671.98/2,506.19 = 891.50/x
  3. Step 3: Cross multiply
    1,671.98x = 2,506.19 × 891.50
  4. Step 4: Simplify right side
    1,671.98x = 2,234,255.85
  5. Step 5: Solve for x
    x = 2,234,255.85/1,671.98
  6. Step 6: Final answer
    x = 1,336.30

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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.