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Finding the Fourth Proportional to 920.03, 1,267.38 and 670.68

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Solution

The fourth proportional to 920.03, 1,267.38 and 670.68 is: 923.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.03 : 1,267.38 = 670.68 : x
  2. Step 2: Convert to fraction form
    920.03/1,267.38 = 670.68/x
  3. Step 3: Cross multiply
    920.03x = 1,267.38 × 670.68
  4. Step 4: Simplify right side
    920.03x = 850,006.42
  5. Step 5: Solve for x
    x = 850,006.42/920.03
  6. Step 6: Final answer
    x = 923.89

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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.