Home / 819,374.40-1,229,061.60-258,465.60

Finding the Fourth Proportional to 819,374.40, 1,229,061.60 and 258,465.60

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Solution

The fourth proportional to 819,374.40, 1,229,061.60 and 258,465.60 is: 387,698.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,374.40 : 1,229,061.60 = 258,465.60 : x
  2. Step 2: Convert to fraction form
    819,374.40/1,229,061.60 = 258,465.60/x
  3. Step 3: Cross multiply
    819,374.40x = 1,229,061.60 × 258,465.60
  4. Step 4: Simplify right side
    819,374.40x = 317,670,143,880.96
  5. Step 5: Solve for x
    x = 317,670,143,880.96/819,374.40
  6. Step 6: Final answer
    x = 387,698.40

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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.