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Finding the Fourth Proportional to 491,176.75, 677,575.80 and 287,094.34

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Solution

The fourth proportional to 491,176.75, 677,575.80 and 287,094.34 is: 396,045.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,176.75 : 677,575.80 = 287,094.34 : x
  2. Step 2: Convert to fraction form
    491,176.75/677,575.80 = 287,094.34/x
  3. Step 3: Cross multiply
    491,176.75x = 677,575.80 × 287,094.34
  4. Step 4: Simplify right side
    491,176.75x = 194,528,178,177.58
  5. Step 5: Solve for x
    x = 194,528,178,177.58/491,176.75
  6. Step 6: Final answer
    x = 396,045.17

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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.