Home / 926,443.20-1,389,664.80-393,981.60

Finding the Fourth Proportional to 926,443.20, 1,389,664.80 and 393,981.60

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Solution

The fourth proportional to 926,443.20, 1,389,664.80 and 393,981.60 is: 590,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    926,443.20 : 1,389,664.80 = 393,981.60 : x
  2. Step 2: Convert to fraction form
    926,443.20/1,389,664.80 = 393,981.60/x
  3. Step 3: Cross multiply
    926,443.20x = 1,389,664.80 × 393,981.60
  4. Step 4: Simplify right side
    926,443.20x = 547,502,361,367.68
  5. Step 5: Solve for x
    x = 547,502,361,367.68/926,443.20
  6. Step 6: Final answer
    x = 590,972.40

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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.