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Finding the Fourth Proportional to 527,718.96, 728,125.28 and 312,911.84

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Solution

The fourth proportional to 527,718.96, 728,125.28 and 312,911.84 is: 431,743.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,718.96 : 728,125.28 = 312,911.84 : x
  2. Step 2: Convert to fraction form
    527,718.96/728,125.28 = 312,911.84/x
  3. Step 3: Cross multiply
    527,718.96x = 728,125.28 × 312,911.84
  4. Step 4: Simplify right side
    527,718.96x = 227,839,021,115.32
  5. Step 5: Solve for x
    x = 227,839,021,115.32/527,718.96
  6. Step 6: Final answer
    x = 431,743.10

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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.