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Finding the Fourth Proportional to 3,010.80, 4,218 and 3,010.80

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Solution

The fourth proportional to 3,010.80, 4,218 and 3,010.80 is: 4,218

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,010.80 : 4,218 = 3,010.80 : x
  2. Step 2: Convert to fraction form
    3,010.80/4,218 = 3,010.80/x
  3. Step 3: Cross multiply
    3,010.80x = 4,218 × 3,010.80
  4. Step 4: Simplify right side
    3,010.80x = 12,699,554.40
  5. Step 5: Solve for x
    x = 12,699,554.40/3,010.80
  6. Step 6: Final answer
    x = 4,218

Related Problems

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Half scale
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Double scale
Find fourth proportional to 3,011.80, 4,219.40 and 3,011.80
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.