Home / 816,903.40-1,225,355.10-396,999.40

Finding the Fourth Proportional to 816,903.40, 1,225,355.10 and 396,999.40

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Solution

The fourth proportional to 816,903.40, 1,225,355.10 and 396,999.40 is: 595,499.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,903.40 : 1,225,355.10 = 396,999.40 : x
  2. Step 2: Convert to fraction form
    816,903.40/1,225,355.10 = 396,999.40/x
  3. Step 3: Cross multiply
    816,903.40x = 1,225,355.10 × 396,999.40
  4. Step 4: Simplify right side
    816,903.40x = 486,465,239,486.94
  5. Step 5: Solve for x
    x = 486,465,239,486.94/816,903.40
  6. Step 6: Final answer
    x = 595,499.10

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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.