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Finding the Fourth Proportional to 826,408.76, 1,140,396.18 and 463,798.76

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Solution

The fourth proportional to 826,408.76, 1,140,396.18 and 463,798.76 is: 640,015.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    826,408.76 : 1,140,396.18 = 463,798.76 : x
  2. Step 2: Convert to fraction form
    826,408.76/1,140,396.18 = 463,798.76/x
  3. Step 3: Cross multiply
    826,408.76x = 1,140,396.18 × 463,798.76
  4. Step 4: Simplify right side
    826,408.76x = 528,914,334,192.74
  5. Step 5: Solve for x
    x = 528,914,334,192.74/826,408.76
  6. Step 6: Final answer
    x = 640,015.40

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Half scale
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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.