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Finding the Fourth Proportional to 1,537.46, 2,121.98 and 874.34

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Solution

The fourth proportional to 1,537.46, 2,121.98 and 874.34 is: 1,206.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,537.46 : 2,121.98 = 874.34 : x
  2. Step 2: Convert to fraction form
    1,537.46/2,121.98 = 874.34/x
  3. Step 3: Cross multiply
    1,537.46x = 2,121.98 × 874.34
  4. Step 4: Simplify right side
    1,537.46x = 1,855,331.99
  5. Step 5: Solve for x
    x = 1,855,331.99/1,537.46
  6. Step 6: Final answer
    x = 1,206.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.