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Finding the Fourth Proportional to 520,057.10, 780,028.05 and 146,117.90

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Solution

The fourth proportional to 520,057.10, 780,028.05 and 146,117.90 is: 219,160.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,057.10 : 780,028.05 = 146,117.90 : x
  2. Step 2: Convert to fraction form
    520,057.10/780,028.05 = 146,117.90/x
  3. Step 3: Cross multiply
    520,057.10x = 780,028.05 × 146,117.90
  4. Step 4: Simplify right side
    520,057.10x = 113,976,060,607.10
  5. Step 5: Solve for x
    x = 113,976,060,607.10/520,057.10
  6. Step 6: Final answer
    x = 219,160.67

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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.