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Finding the Fourth Proportional to 529,117.58, 730,187.74 and 287,404.86

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Solution

The fourth proportional to 529,117.58, 730,187.74 and 287,404.86 is: 396,621.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,117.58 : 730,187.74 = 287,404.86 : x
  2. Step 2: Convert to fraction form
    529,117.58/730,187.74 = 287,404.86/x
  3. Step 3: Cross multiply
    529,117.58x = 730,187.74 × 287,404.86
  4. Step 4: Simplify right side
    529,117.58x = 209,859,505,188.42
  5. Step 5: Solve for x
    x = 209,859,505,188.42/529,117.58
  6. Step 6: Final answer
    x = 396,621.68

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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.