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Finding the Fourth Proportional to 4,089.60, 5,918.40 and 4,089.60

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Solution

The fourth proportional to 4,089.60, 5,918.40 and 4,089.60 is: 5,918.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,089.60 : 5,918.40 = 4,089.60 : x
  2. Step 2: Convert to fraction form
    4,089.60/5,918.40 = 4,089.60/x
  3. Step 3: Cross multiply
    4,089.60x = 5,918.40 × 4,089.60
  4. Step 4: Simplify right side
    4,089.60x = 24,203,888.64
  5. Step 5: Solve for x
    x = 24,203,888.64/4,089.60
  6. Step 6: Final answer
    x = 5,918.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.