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Finding the Fourth Proportional to 1,146.21, 1,581.79 and 703.86

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Solution

The fourth proportional to 1,146.21, 1,581.79 and 703.86 is: 971.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.21 : 1,581.79 = 703.86 : x
  2. Step 2: Convert to fraction form
    1,146.21/1,581.79 = 703.86/x
  3. Step 3: Cross multiply
    1,146.21x = 1,581.79 × 703.86
  4. Step 4: Simplify right side
    1,146.21x = 1,113,350.80
  5. Step 5: Solve for x
    x = 1,113,350.80/1,146.21
  6. Step 6: Final answer
    x = 971.34

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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.