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Finding the Fourth Proportional to 1,101.19, 1,520.34 and 703.09

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Solution

The fourth proportional to 1,101.19, 1,520.34 and 703.09 is: 970.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.19 : 1,520.34 = 703.09 : x
  2. Step 2: Convert to fraction form
    1,101.19/1,520.34 = 703.09/x
  3. Step 3: Cross multiply
    1,101.19x = 1,520.34 × 703.09
  4. Step 4: Simplify right side
    1,101.19x = 1,068,935.85
  5. Step 5: Solve for x
    x = 1,068,935.85/1,101.19
  6. Step 6: Final answer
    x = 970.71

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Half scale
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Double scale
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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.