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Finding the Fourth Proportional to 529,161.36, 730,248.12 and 287,448.72

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Solution

The fourth proportional to 529,161.36, 730,248.12 and 287,448.72 is: 396,682.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,161.36 : 730,248.12 = 287,448.72 : x
  2. Step 2: Convert to fraction form
    529,161.36/730,248.12 = 287,448.72/x
  3. Step 3: Cross multiply
    529,161.36x = 730,248.12 × 287,448.72
  4. Step 4: Simplify right side
    529,161.36x = 209,908,887,376.41
  5. Step 5: Solve for x
    x = 209,908,887,376.41/529,161.36
  6. Step 6: Final answer
    x = 396,682.19

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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.