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Finding the Fourth Proportional to 1,570.15, 2,167.02 and 906.86

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Solution

The fourth proportional to 1,570.15, 2,167.02 and 906.86 is: 1,251.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.15 : 2,167.02 = 906.86 : x
  2. Step 2: Convert to fraction form
    1,570.15/2,167.02 = 906.86/x
  3. Step 3: Cross multiply
    1,570.15x = 2,167.02 × 906.86
  4. Step 4: Simplify right side
    1,570.15x = 1,965,183.76
  5. Step 5: Solve for x
    x = 1,965,183.76/1,570.15
  6. Step 6: Final answer
    x = 1,251.59

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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.