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Finding the Fourth Proportional to 520,072.38, 780,069.69 and 187,648.38

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Solution

The fourth proportional to 520,072.38, 780,069.69 and 187,648.38 is: 281,458.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,072.38 : 780,069.69 = 187,648.38 : x
  2. Step 2: Convert to fraction form
    520,072.38/780,069.69 = 187,648.38/x
  3. Step 3: Cross multiply
    520,072.38x = 780,069.69 × 187,648.38
  4. Step 4: Simplify right side
    520,072.38x = 146,378,813,615.60
  5. Step 5: Solve for x
    x = 146,378,813,615.60/520,072.38
  6. Step 6: Final answer
    x = 281,458.54

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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.