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Finding the Fourth Proportional to 5,289.60, 7,934.40 and 1,394.40

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Solution

The fourth proportional to 5,289.60, 7,934.40 and 1,394.40 is: 2,091.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,289.60 : 7,934.40 = 1,394.40 : x
  2. Step 2: Convert to fraction form
    5,289.60/7,934.40 = 1,394.40/x
  3. Step 3: Cross multiply
    5,289.60x = 7,934.40 × 1,394.40
  4. Step 4: Simplify right side
    5,289.60x = 11,063,727.36
  5. Step 5: Solve for x
    x = 11,063,727.36/5,289.60
  6. Step 6: Final answer
    x = 2,091.60

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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.