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Finding the Fourth Proportional to 621,305.60, 856,908.60 and 403,275.92

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Solution

The fourth proportional to 621,305.60, 856,908.60 and 403,275.92 is: 556,200.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,305.60 : 856,908.60 = 403,275.92 : x
  2. Step 2: Convert to fraction form
    621,305.60/856,908.60 = 403,275.92/x
  3. Step 3: Cross multiply
    621,305.60x = 856,908.60 × 403,275.92
  4. Step 4: Simplify right side
    621,305.60x = 345,570,604,020.91
  5. Step 5: Solve for x
    x = 345,570,604,020.91/621,305.60
  6. Step 6: Final answer
    x = 556,200.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.