Home / 890,735.40-1,336,103.10-780,143.40

Finding the Fourth Proportional to 890,735.40, 1,336,103.10 and 780,143.40

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Solution

The fourth proportional to 890,735.40, 1,336,103.10 and 780,143.40 is: 1,170,215.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,735.40 : 1,336,103.10 = 780,143.40 : x
  2. Step 2: Convert to fraction form
    890,735.40/1,336,103.10 = 780,143.40/x
  3. Step 3: Cross multiply
    890,735.40x = 1,336,103.10 × 780,143.40
  4. Step 4: Simplify right side
    890,735.40x = 1,042,352,015,184.54
  5. Step 5: Solve for x
    x = 1,042,352,015,184.54/890,735.40
  6. Step 6: Final answer
    x = 1,170,215.10

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Double scale
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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.