Home / 890,723.40-1,336,085.10-780,131.40

Finding the Fourth Proportional to 890,723.40, 1,336,085.10 and 780,131.40

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Solution

The fourth proportional to 890,723.40, 1,336,085.10 and 780,131.40 is: 1,170,197.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,723.40 : 1,336,085.10 = 780,131.40 : x
  2. Step 2: Convert to fraction form
    890,723.40/1,336,085.10 = 780,131.40/x
  3. Step 3: Cross multiply
    890,723.40x = 1,336,085.10 × 780,131.40
  4. Step 4: Simplify right side
    890,723.40x = 1,042,321,939,582.14
  5. Step 5: Solve for x
    x = 1,042,321,939,582.14/890,723.40
  6. Step 6: Final answer
    x = 1,170,197.10

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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.