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Finding the Fourth Proportional to 3,330.94, 4,999.48 and 3,130

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Solution

The fourth proportional to 3,330.94, 4,999.48 and 3,130 is: 4,697.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,330.94 : 4,999.48 = 3,130 : x
  2. Step 2: Convert to fraction form
    3,330.94/4,999.48 = 3,130/x
  3. Step 3: Cross multiply
    3,330.94x = 4,999.48 × 3,130
  4. Step 4: Simplify right side
    3,330.94x = 15,648,372.40
  5. Step 5: Solve for x
    x = 15,648,372.40/3,330.94
  6. Step 6: Final answer
    x = 4,697.88

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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.