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Finding the Fourth Proportional to 528,800.40, 729,750.24 and 287,085.60

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Solution

The fourth proportional to 528,800.40, 729,750.24 and 287,085.60 is: 396,181.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,800.40 : 729,750.24 = 287,085.60 : x
  2. Step 2: Convert to fraction form
    528,800.40/729,750.24 = 287,085.60/x
  3. Step 3: Cross multiply
    528,800.40x = 729,750.24 × 287,085.60
  4. Step 4: Simplify right side
    528,800.40x = 209,500,785,500.54
  5. Step 5: Solve for x
    x = 209,500,785,500.54/528,800.40
  6. Step 6: Final answer
    x = 396,181.22

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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.