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Finding the Fourth Proportional to 519,935.56, 717,515.82 and 305,079.21

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Solution

The fourth proportional to 519,935.56, 717,515.82 and 305,079.21 is: 421,012.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,935.56 : 717,515.82 = 305,079.21 : x
  2. Step 2: Convert to fraction form
    519,935.56/717,515.82 = 305,079.21/x
  3. Step 3: Cross multiply
    519,935.56x = 717,515.82 × 305,079.21
  4. Step 4: Simplify right side
    519,935.56x = 218,899,159,528.10
  5. Step 5: Solve for x
    x = 218,899,159,528.10/519,935.56
  6. Step 6: Final answer
    x = 421,012.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.