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Finding the Fourth Proportional to 528,087.40, 792,131.10 and 291,891.40

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Solution

The fourth proportional to 528,087.40, 792,131.10 and 291,891.40 is: 437,837.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,087.40 : 792,131.10 = 291,891.40 : x
  2. Step 2: Convert to fraction form
    528,087.40/792,131.10 = 291,891.40/x
  3. Step 3: Cross multiply
    528,087.40x = 792,131.10 × 291,891.40
  4. Step 4: Simplify right side
    528,087.40x = 231,216,255,762.54
  5. Step 5: Solve for x
    x = 231,216,255,762.54/528,087.40
  6. Step 6: Final answer
    x = 437,837.10

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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.