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Finding the Fourth Proportional to 2,486.80, 3,730.08 and 926.80

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Solution

The fourth proportional to 2,486.80, 3,730.08 and 926.80 is: 1,390.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.80 : 3,730.08 = 926.80 : x
  2. Step 2: Convert to fraction form
    2,486.80/3,730.08 = 926.80/x
  3. Step 3: Cross multiply
    2,486.80x = 3,730.08 × 926.80
  4. Step 4: Simplify right side
    2,486.80x = 3,457,038.14
  5. Step 5: Solve for x
    x = 3,457,038.14/2,486.80
  6. Step 6: Final answer
    x = 1,390.16

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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.