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Finding the Fourth Proportional to 519,785.40, 779,678.10 and 414,809.40

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Solution

The fourth proportional to 519,785.40, 779,678.10 and 414,809.40 is: 622,214.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,785.40 : 779,678.10 = 414,809.40 : x
  2. Step 2: Convert to fraction form
    519,785.40/779,678.10 = 414,809.40/x
  3. Step 3: Cross multiply
    519,785.40x = 779,678.10 × 414,809.40
  4. Step 4: Simplify right side
    519,785.40x = 323,417,804,854.14
  5. Step 5: Solve for x
    x = 323,417,804,854.14/519,785.40
  6. Step 6: Final answer
    x = 622,214.10

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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.