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Finding the Fourth Proportional to 621,077.40, 857,737.44 and 427,987.17

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Solution

The fourth proportional to 621,077.40, 857,737.44 and 427,987.17 is: 591,070.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,077.40 : 857,737.44 = 427,987.17 : x
  2. Step 2: Convert to fraction form
    621,077.40/857,737.44 = 427,987.17/x
  3. Step 3: Cross multiply
    621,077.40x = 857,737.44 × 427,987.17
  4. Step 4: Simplify right side
    621,077.40x = 367,100,619,548.65
  5. Step 5: Solve for x
    x = 367,100,619,548.65/621,077.40
  6. Step 6: Final answer
    x = 591,070.65

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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.