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Finding the Fourth Proportional to 621,541.17, 857,690.51 and 345,891.69

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Solution

The fourth proportional to 621,541.17, 857,690.51 and 345,891.69 is: 477,310.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,541.17 : 857,690.51 = 345,891.69 : x
  2. Step 2: Convert to fraction form
    621,541.17/857,690.51 = 345,891.69/x
  3. Step 3: Cross multiply
    621,541.17x = 857,690.51 × 345,891.69
  4. Step 4: Simplify right side
    621,541.17x = 296,668,018,271.40
  5. Step 5: Solve for x
    x = 296,668,018,271.40/621,541.17
  6. Step 6: Final answer
    x = 477,310.33

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Double scale
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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.