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Finding the Fourth Proportional to 4,355.40, 6,530.40 and 2,505.60

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Solution

The fourth proportional to 4,355.40, 6,530.40 and 2,505.60 is: 3,756.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,355.40 : 6,530.40 = 2,505.60 : x
  2. Step 2: Convert to fraction form
    4,355.40/6,530.40 = 2,505.60/x
  3. Step 3: Cross multiply
    4,355.40x = 6,530.40 × 2,505.60
  4. Step 4: Simplify right side
    4,355.40x = 16,362,570.24
  5. Step 5: Solve for x
    x = 16,362,570.24/4,355.40
  6. Step 6: Final answer
    x = 3,756.85

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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.