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Finding the Fourth Proportional to 640,891.90, 961,392.73 and 167,576.50

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Solution

The fourth proportional to 640,891.90, 961,392.73 and 167,576.50 is: 251,379.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,891.90 : 961,392.73 = 167,576.50 : x
  2. Step 2: Convert to fraction form
    640,891.90/961,392.73 = 167,576.50/x
  3. Step 3: Cross multiply
    640,891.90x = 961,392.73 × 167,576.50
  4. Step 4: Simplify right side
    640,891.90x = 161,106,828,818.85
  5. Step 5: Solve for x
    x = 161,106,828,818.85/640,891.90
  6. Step 6: Final answer
    x = 251,379.10

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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.