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Finding the Fourth Proportional to 2,420, 3,630.47 and 776.57

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Solution

The fourth proportional to 2,420, 3,630.47 and 776.57 is: 1,165.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420 : 3,630.47 = 776.57 : x
  2. Step 2: Convert to fraction form
    2,420/3,630.47 = 776.57/x
  3. Step 3: Cross multiply
    2,420x = 3,630.47 × 776.57
  4. Step 4: Simplify right side
    2,420x = 2,819,310.21
  5. Step 5: Solve for x
    x = 2,819,310.21/2,420
  6. Step 6: Final answer
    x = 1,165.00

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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.