Home / 830,039.40-1,245,059.10-409,260.60

Finding the Fourth Proportional to 830,039.40, 1,245,059.10 and 409,260.60

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Solution

The fourth proportional to 830,039.40, 1,245,059.10 and 409,260.60 is: 613,890.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,039.40 : 1,245,059.10 = 409,260.60 : x
  2. Step 2: Convert to fraction form
    830,039.40/1,245,059.10 = 409,260.60/x
  3. Step 3: Cross multiply
    830,039.40x = 1,245,059.10 × 409,260.60
  4. Step 4: Simplify right side
    830,039.40x = 509,553,634,301.46
  5. Step 5: Solve for x
    x = 509,553,634,301.46/830,039.40
  6. Step 6: Final answer
    x = 613,890.90

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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.