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Finding the Fourth Proportional to 2,997.20, 4,495.79 and 945.20

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Solution

The fourth proportional to 2,997.20, 4,495.79 and 945.20 is: 1,417.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,997.20 : 4,495.79 = 945.20 : x
  2. Step 2: Convert to fraction form
    2,997.20/4,495.79 = 945.20/x
  3. Step 3: Cross multiply
    2,997.20x = 4,495.79 × 945.20
  4. Step 4: Simplify right side
    2,997.20x = 4,249,393.50
  5. Step 5: Solve for x
    x = 4,249,393.50/2,997.20
  6. Step 6: Final answer
    x = 1,417.79

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.