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Finding the Fourth Proportional to 3,333.60, 5,000.40 and 868.40

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Solution

The fourth proportional to 3,333.60, 5,000.40 and 868.40 is: 1,302.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,333.60 : 5,000.40 = 868.40 : x
  2. Step 2: Convert to fraction form
    3,333.60/5,000.40 = 868.40/x
  3. Step 3: Cross multiply
    3,333.60x = 5,000.40 × 868.40
  4. Step 4: Simplify right side
    3,333.60x = 4,342,347.36
  5. Step 5: Solve for x
    x = 4,342,347.36/3,333.60
  6. Step 6: Final answer
    x = 1,302.60

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1.5x scale

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.