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Finding the Fourth Proportional to 1,570.03, 2,166.50 and 906.80

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Solution

The fourth proportional to 1,570.03, 2,166.50 and 906.80 is: 1,251.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.03 : 2,166.50 = 906.80 : x
  2. Step 2: Convert to fraction form
    1,570.03/2,166.50 = 906.80/x
  3. Step 3: Cross multiply
    1,570.03x = 2,166.50 × 906.80
  4. Step 4: Simplify right side
    1,570.03x = 1,964,568.53
  5. Step 5: Solve for x
    x = 1,964,568.53/1,570.03
  6. Step 6: Final answer
    x = 1,251.29

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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.