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Finding the Fourth Proportional to 525,111.70, 787,667.55 and 258,999.70

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Solution

The fourth proportional to 525,111.70, 787,667.55 and 258,999.70 is: 388,499.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,111.70 : 787,667.55 = 258,999.70 : x
  2. Step 2: Convert to fraction form
    525,111.70/787,667.55 = 258,999.70/x
  3. Step 3: Cross multiply
    525,111.70x = 787,667.55 × 258,999.70
  4. Step 4: Simplify right side
    525,111.70x = 204,005,659,149.74
  5. Step 5: Solve for x
    x = 204,005,659,149.74/525,111.70
  6. Step 6: Final answer
    x = 388,499.55

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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.