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Finding the Fourth Proportional to 638,705.64, 881,426.55 and 412,744.80

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Solution

The fourth proportional to 638,705.64, 881,426.55 and 412,744.80 is: 569,596.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,705.64 : 881,426.55 = 412,744.80 : x
  2. Step 2: Convert to fraction form
    638,705.64/881,426.55 = 412,744.80/x
  3. Step 3: Cross multiply
    638,705.64x = 881,426.55 × 412,744.80
  4. Step 4: Simplify right side
    638,705.64x = 363,804,225,094.44
  5. Step 5: Solve for x
    x = 363,804,225,094.44/638,705.64
  6. Step 6: Final answer
    x = 569,596.07

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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.