Home / 520,795.24-781,056.16-221,121.56

Finding the Fourth Proportional to 520,795.24, 781,056.16 and 221,121.56

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Solution

The fourth proportional to 520,795.24, 781,056.16 and 221,121.56 is: 331,624.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,795.24 : 781,056.16 = 221,121.56 : x
  2. Step 2: Convert to fraction form
    520,795.24/781,056.16 = 221,121.56/x
  3. Step 3: Cross multiply
    520,795.24x = 781,056.16 × 221,121.56
  4. Step 4: Simplify right side
    520,795.24x = 172,708,356,546.81
  5. Step 5: Solve for x
    x = 172,708,356,546.81/520,795.24
  6. Step 6: Final answer
    x = 331,624.30

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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.