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Finding the Fourth Proportional to 1,982.60, 2,970.30 and 1,615.40

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Solution

The fourth proportional to 1,982.60, 2,970.30 and 1,615.40 is: 2,420.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.60 : 2,970.30 = 1,615.40 : x
  2. Step 2: Convert to fraction form
    1,982.60/2,970.30 = 1,615.40/x
  3. Step 3: Cross multiply
    1,982.60x = 2,970.30 × 1,615.40
  4. Step 4: Simplify right side
    1,982.60x = 4,798,222.62
  5. Step 5: Solve for x
    x = 4,798,222.62/1,982.60
  6. Step 6: Final answer
    x = 2,420.17

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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.