Home / 862,539.60-1,293,809.40-390,147.60

Finding the Fourth Proportional to 862,539.60, 1,293,809.40 and 390,147.60

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Solution

The fourth proportional to 862,539.60, 1,293,809.40 and 390,147.60 is: 585,221.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,539.60 : 1,293,809.40 = 390,147.60 : x
  2. Step 2: Convert to fraction form
    862,539.60/1,293,809.40 = 390,147.60/x
  3. Step 3: Cross multiply
    862,539.60x = 1,293,809.40 × 390,147.60
  4. Step 4: Simplify right side
    862,539.60x = 504,776,632,267.44
  5. Step 5: Solve for x
    x = 504,776,632,267.44/862,539.60
  6. Step 6: Final answer
    x = 585,221.40

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Double scale
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Similar ratio
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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.