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Finding the Fourth Proportional to 3,411.12, 4,706.28 and 1,918.80

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Solution

The fourth proportional to 3,411.12, 4,706.28 and 1,918.80 is: 2,647.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,411.12 : 4,706.28 = 1,918.80 : x
  2. Step 2: Convert to fraction form
    3,411.12/4,706.28 = 1,918.80/x
  3. Step 3: Cross multiply
    3,411.12x = 4,706.28 × 1,918.80
  4. Step 4: Simplify right side
    3,411.12x = 9,030,410.06
  5. Step 5: Solve for x
    x = 9,030,410.06/3,411.12
  6. Step 6: Final answer
    x = 2,647.34

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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.