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Finding the Fourth Proportional to 522,085.40, 783,128.10 and 417,109.40

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Solution

The fourth proportional to 522,085.40, 783,128.10 and 417,109.40 is: 625,664.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,085.40 : 783,128.10 = 417,109.40 : x
  2. Step 2: Convert to fraction form
    522,085.40/783,128.10 = 417,109.40/x
  3. Step 3: Cross multiply
    522,085.40x = 783,128.10 × 417,109.40
  4. Step 4: Simplify right side
    522,085.40x = 326,650,091,914.14
  5. Step 5: Solve for x
    x = 326,650,091,914.14/522,085.40
  6. Step 6: Final answer
    x = 625,664.10

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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.