Home / 856,407.90-1,282,867.92-405,762.78

Finding the Fourth Proportional to 856,407.90, 1,282,867.92 and 405,762.78

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Solution

The fourth proportional to 856,407.90, 1,282,867.92 and 405,762.78 is: 607,817.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,407.90 : 1,282,867.92 = 405,762.78 : x
  2. Step 2: Convert to fraction form
    856,407.90/1,282,867.92 = 405,762.78/x
  3. Step 3: Cross multiply
    856,407.90x = 1,282,867.92 × 405,762.78
  4. Step 4: Simplify right side
    856,407.90x = 520,540,053,592.02
  5. Step 5: Solve for x
    x = 520,540,053,592.02/856,407.90
  6. Step 6: Final answer
    x = 607,817.90

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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.