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Finding the Fourth Proportional to 520,087.80, 780,174.90 and 165,091.80

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Solution

The fourth proportional to 520,087.80, 780,174.90 and 165,091.80 is: 247,651.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,087.80 : 780,174.90 = 165,091.80 : x
  2. Step 2: Convert to fraction form
    520,087.80/780,174.90 = 165,091.80/x
  3. Step 3: Cross multiply
    520,087.80x = 780,174.90 × 165,091.80
  4. Step 4: Simplify right side
    520,087.80x = 128,800,478,555.82
  5. Step 5: Solve for x
    x = 128,800,478,555.82/520,087.80
  6. Step 6: Final answer
    x = 247,651.41

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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.