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Finding the Fourth Proportional to 780,019, 1,170,028.52 and 189,043

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Solution

The fourth proportional to 780,019, 1,170,028.52 and 189,043 is: 283,564.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,019 : 1,170,028.52 = 189,043 : x
  2. Step 2: Convert to fraction form
    780,019/1,170,028.52 = 189,043/x
  3. Step 3: Cross multiply
    780,019x = 1,170,028.52 × 189,043
  4. Step 4: Simplify right side
    780,019x = 221,185,701,506.36
  5. Step 5: Solve for x
    x = 221,185,701,506.36/780,019
  6. Step 6: Final answer
    x = 283,564.50

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Similar ratio
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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.