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Finding the Fourth Proportional to 287,018.92, 395,861.70 and 186,449.32

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Solution

The fourth proportional to 287,018.92, 395,861.70 and 186,449.32 is: 257,154.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,018.92 : 395,861.70 = 186,449.32 : x
  2. Step 2: Convert to fraction form
    287,018.92/395,861.70 = 186,449.32/x
  3. Step 3: Cross multiply
    287,018.92x = 395,861.70 × 186,449.32
  4. Step 4: Simplify right side
    287,018.92x = 73,808,144,779.04
  5. Step 5: Solve for x
    x = 73,808,144,779.04/287,018.92
  6. Step 6: Final answer
    x = 257,154.28

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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.