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Finding the Fourth Proportional to 520,091.65, 780,137.48 and 520,091.65

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Solution

The fourth proportional to 520,091.65, 780,137.48 and 520,091.65 is: 780,137.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,091.65 : 780,137.48 = 520,091.65 : x
  2. Step 2: Convert to fraction form
    520,091.65/780,137.48 = 520,091.65/x
  3. Step 3: Cross multiply
    520,091.65x = 780,137.48 × 520,091.65
  4. Step 4: Simplify right side
    520,091.65x = 405,742,989,200.04
  5. Step 5: Solve for x
    x = 405,742,989,200.04/520,091.65
  6. Step 6: Final answer
    x = 780,137.48

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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.