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Finding the Fourth Proportional to 399,659.06, 551,775.54 and 256,671.18

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Solution

The fourth proportional to 399,659.06, 551,775.54 and 256,671.18 is: 354,364.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,659.06 : 551,775.54 = 256,671.18 : x
  2. Step 2: Convert to fraction form
    399,659.06/551,775.54 = 256,671.18/x
  3. Step 3: Cross multiply
    399,659.06x = 551,775.54 × 256,671.18
  4. Step 4: Simplify right side
    399,659.06x = 141,624,879,909.45
  5. Step 5: Solve for x
    x = 141,624,879,909.45/399,659.06
  6. Step 6: Final answer
    x = 354,364.24

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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.