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Finding the Fourth Proportional to 640,370.74, 883,626.23 and 411,238.40

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Solution

The fourth proportional to 640,370.74, 883,626.23 and 411,238.40 is: 567,454.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,370.74 : 883,626.23 = 411,238.40 : x
  2. Step 2: Convert to fraction form
    640,370.74/883,626.23 = 411,238.40/x
  3. Step 3: Cross multiply
    640,370.74x = 883,626.23 × 411,238.40
  4. Step 4: Simplify right side
    640,370.74x = 363,381,035,842.26
  5. Step 5: Solve for x
    x = 363,381,035,842.26/640,370.74
  6. Step 6: Final answer
    x = 567,454.15

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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.