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Finding the Fourth Proportional to 529,188.12, 730,284.80 and 287,472.65

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Solution

The fourth proportional to 529,188.12, 730,284.80 and 287,472.65 is: 396,715.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,188.12 : 730,284.80 = 287,472.65 : x
  2. Step 2: Convert to fraction form
    529,188.12/730,284.80 = 287,472.65/x
  3. Step 3: Cross multiply
    529,188.12x = 730,284.80 × 287,472.65
  4. Step 4: Simplify right side
    529,188.12x = 209,936,901,621.93
  5. Step 5: Solve for x
    x = 209,936,901,621.93/529,188.12
  6. Step 6: Final answer
    x = 396,715.07

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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.