Home / 1,008,439.40-1,512,659.10-780,116.60

Finding the Fourth Proportional to 1,008,439.40, 1,512,659.10 and 780,116.60

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Solution

The fourth proportional to 1,008,439.40, 1,512,659.10 and 780,116.60 is: 1,170,174.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008,439.40 : 1,512,659.10 = 780,116.60 : x
  2. Step 2: Convert to fraction form
    1,008,439.40/1,512,659.10 = 780,116.60/x
  3. Step 3: Cross multiply
    1,008,439.40x = 1,512,659.10 × 780,116.60
  4. Step 4: Simplify right side
    1,008,439.40x = 1,180,050,474,051.06
  5. Step 5: Solve for x
    x = 1,180,050,474,051.06/1,008,439.40
  6. Step 6: Final answer
    x = 1,170,174.90

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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.