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Finding the Fourth Proportional to 2,906.60, 4,359.90 and 715.30

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Solution

The fourth proportional to 2,906.60, 4,359.90 and 715.30 is: 1,072.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,906.60 : 4,359.90 = 715.30 : x
  2. Step 2: Convert to fraction form
    2,906.60/4,359.90 = 715.30/x
  3. Step 3: Cross multiply
    2,906.60x = 4,359.90 × 715.30
  4. Step 4: Simplify right side
    2,906.60x = 3,118,636.47
  5. Step 5: Solve for x
    x = 3,118,636.47/2,906.60
  6. Step 6: Final answer
    x = 1,072.95

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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.