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Finding the Fourth Proportional to 3,750, 5,621.16 and 1,560

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Solution

The fourth proportional to 3,750, 5,621.16 and 1,560 is: 2,338.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,750 : 5,621.16 = 1,560 : x
  2. Step 2: Convert to fraction form
    3,750/5,621.16 = 1,560/x
  3. Step 3: Cross multiply
    3,750x = 5,621.16 × 1,560
  4. Step 4: Simplify right side
    3,750x = 8,769,009.60
  5. Step 5: Solve for x
    x = 8,769,009.60/3,750
  6. Step 6: Final answer
    x = 2,338.40

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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.