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Finding the Fourth Proportional to 348,706.40, 479,704.64 and 305,491.28

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Solution

The fourth proportional to 348,706.40, 479,704.64 and 305,491.28 is: 420,254.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,706.40 : 479,704.64 = 305,491.28 : x
  2. Step 2: Convert to fraction form
    348,706.40/479,704.64 = 305,491.28/x
  3. Step 3: Cross multiply
    348,706.40x = 479,704.64 × 305,491.28
  4. Step 4: Simplify right side
    348,706.40x = 146,545,584,495.54
  5. Step 5: Solve for x
    x = 146,545,584,495.54/348,706.40
  6. Step 6: Final answer
    x = 420,254.93

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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.