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Finding the Fourth Proportional to 627,305.96, 865,654.02 and 355,368.30

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Solution

The fourth proportional to 627,305.96, 865,654.02 and 355,368.30 is: 490,392.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,305.96 : 865,654.02 = 355,368.30 : x
  2. Step 2: Convert to fraction form
    627,305.96/865,654.02 = 355,368.30/x
  3. Step 3: Cross multiply
    627,305.96x = 865,654.02 × 355,368.30
  4. Step 4: Simplify right side
    627,305.96x = 307,625,997,475.57
  5. Step 5: Solve for x
    x = 307,625,997,475.57/627,305.96
  6. Step 6: Final answer
    x = 490,392.28

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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.