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Finding the Fourth Proportional to 587,515, 810,775.56 and 319,243

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Solution

The fourth proportional to 587,515, 810,775.56 and 319,243 is: 440,557.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,515 : 810,775.56 = 319,243 : x
  2. Step 2: Convert to fraction form
    587,515/810,775.56 = 319,243/x
  3. Step 3: Cross multiply
    587,515x = 810,775.56 × 319,243
  4. Step 4: Simplify right side
    587,515x = 258,834,422,101.08
  5. Step 5: Solve for x
    x = 258,834,422,101.08/587,515
  6. Step 6: Final answer
    x = 440,557.98

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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.