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Finding the Fourth Proportional to 287,953.12, 431,900.46 and 77,612.32

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Solution

The fourth proportional to 287,953.12, 431,900.46 and 77,612.32 is: 116,410.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,953.12 : 431,900.46 = 77,612.32 : x
  2. Step 2: Convert to fraction form
    287,953.12/431,900.46 = 77,612.32/x
  3. Step 3: Cross multiply
    287,953.12x = 431,900.46 × 77,612.32
  4. Step 4: Simplify right side
    287,953.12x = 33,520,796,709.67
  5. Step 5: Solve for x
    x = 33,520,796,709.67/287,953.12
  6. Step 6: Final answer
    x = 116,410.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.