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Finding the Fourth Proportional to 5,269.80, 7,904.70 and 2,645.40

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Solution

The fourth proportional to 5,269.80, 7,904.70 and 2,645.40 is: 3,968.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,269.80 : 7,904.70 = 2,645.40 : x
  2. Step 2: Convert to fraction form
    5,269.80/7,904.70 = 2,645.40/x
  3. Step 3: Cross multiply
    5,269.80x = 7,904.70 × 2,645.40
  4. Step 4: Simplify right side
    5,269.80x = 20,911,093.38
  5. Step 5: Solve for x
    x = 20,911,093.38/5,269.80
  6. Step 6: Final answer
    x = 3,968.10

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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.