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Finding the Fourth Proportional to 3,392.59, 4,681.94 and 1,900.21

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Solution

The fourth proportional to 3,392.59, 4,681.94 and 1,900.21 is: 2,622.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,392.59 : 4,681.94 = 1,900.21 : x
  2. Step 2: Convert to fraction form
    3,392.59/4,681.94 = 1,900.21/x
  3. Step 3: Cross multiply
    3,392.59x = 4,681.94 × 1,900.21
  4. Step 4: Simplify right side
    3,392.59x = 8,896,669.21
  5. Step 5: Solve for x
    x = 8,896,669.21/3,392.59
  6. Step 6: Final answer
    x = 2,622.38

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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.