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Finding the Fourth Proportional to 620,661.30, 930,991.95 and 368,718.90

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Solution

The fourth proportional to 620,661.30, 930,991.95 and 368,718.90 is: 553,078.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,661.30 : 930,991.95 = 368,718.90 : x
  2. Step 2: Convert to fraction form
    620,661.30/930,991.95 = 368,718.90/x
  3. Step 3: Cross multiply
    620,661.30x = 930,991.95 × 368,718.90
  4. Step 4: Simplify right side
    620,661.30x = 343,274,327,712.86
  5. Step 5: Solve for x
    x = 343,274,327,712.86/620,661.30
  6. Step 6: Final answer
    x = 553,078.35

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.