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Finding the Fourth Proportional to 3,354.18, 4,629 and 1,938.12

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Solution

The fourth proportional to 3,354.18, 4,629 and 1,938.12 is: 2,674.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,354.18 : 4,629 = 1,938.12 : x
  2. Step 2: Convert to fraction form
    3,354.18/4,629 = 1,938.12/x
  3. Step 3: Cross multiply
    3,354.18x = 4,629 × 1,938.12
  4. Step 4: Simplify right side
    3,354.18x = 8,971,557.48
  5. Step 5: Solve for x
    x = 8,971,557.48/3,354.18
  6. Step 6: Final answer
    x = 2,674.74

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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.