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Finding the Fourth Proportional to 645,953.32, 890,491.75 and 454,372.12

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Solution

The fourth proportional to 645,953.32, 890,491.75 and 454,372.12 is: 626,383.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,953.32 : 890,491.75 = 454,372.12 : x
  2. Step 2: Convert to fraction form
    645,953.32/890,491.75 = 454,372.12/x
  3. Step 3: Cross multiply
    645,953.32x = 890,491.75 × 454,372.12
  4. Step 4: Simplify right side
    645,953.32x = 404,614,624,290.01
  5. Step 5: Solve for x
    x = 404,614,624,290.01/645,953.32
  6. Step 6: Final answer
    x = 626,383.69

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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.