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Finding the Fourth Proportional to 460,805.77, 691,208.11 and 128,381.77

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Solution

The fourth proportional to 460,805.77, 691,208.11 and 128,381.77 is: 192,572.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    460,805.77 : 691,208.11 = 128,381.77 : x
  2. Step 2: Convert to fraction form
    460,805.77/691,208.11 = 128,381.77/x
  3. Step 3: Cross multiply
    460,805.77x = 691,208.11 × 128,381.77
  4. Step 4: Simplify right side
    460,805.77x = 88,738,520,600.15
  5. Step 5: Solve for x
    x = 88,738,520,600.15/460,805.77
  6. Step 6: Final answer
    x = 192,572.50

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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.