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Finding the Fourth Proportional to 621,390.84, 857,444.01 and 345,683.55

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Solution

The fourth proportional to 621,390.84, 857,444.01 and 345,683.55 is: 477,001.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,390.84 : 857,444.01 = 345,683.55 : x
  2. Step 2: Convert to fraction form
    621,390.84/857,444.01 = 345,683.55/x
  3. Step 3: Cross multiply
    621,390.84x = 857,444.01 × 345,683.55
  4. Step 4: Simplify right side
    621,390.84x = 296,404,285,015.82
  5. Step 5: Solve for x
    x = 296,404,285,015.82/621,390.84
  6. Step 6: Final answer
    x = 477,001.38

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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.