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Finding the Fourth Proportional to 647,362.38, 893,476.53 and 405,854.40

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Solution

The fourth proportional to 647,362.38, 893,476.53 and 405,854.40 is: 560,152.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,362.38 : 893,476.53 = 405,854.40 : x
  2. Step 2: Convert to fraction form
    647,362.38/893,476.53 = 405,854.40/x
  3. Step 3: Cross multiply
    647,362.38x = 893,476.53 × 405,854.40
  4. Step 4: Simplify right side
    647,362.38x = 362,621,380,997.23
  5. Step 5: Solve for x
    x = 362,621,380,997.23/647,362.38
  6. Step 6: Final answer
    x = 560,152.08

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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.