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Finding the Fourth Proportional to 633,433.77, 873,807.35 and 391,639.05

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Solution

The fourth proportional to 633,433.77, 873,807.35 and 391,639.05 is: 540,257.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,433.77 : 873,807.35 = 391,639.05 : x
  2. Step 2: Convert to fraction form
    633,433.77/873,807.35 = 391,639.05/x
  3. Step 3: Cross multiply
    633,433.77x = 873,807.35 × 391,639.05
  4. Step 4: Simplify right side
    633,433.77x = 342,217,078,478.82
  5. Step 5: Solve for x
    x = 342,217,078,478.82/633,433.77
  6. Step 6: Final answer
    x = 540,257.08

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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.