Home / 640,531.08-960,046.20-261,215.28

Finding the Fourth Proportional to 640,531.08, 960,046.20 and 261,215.28

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Solution

The fourth proportional to 640,531.08, 960,046.20 and 261,215.28 is: 391,516.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,531.08 : 960,046.20 = 261,215.28 : x
  2. Step 2: Convert to fraction form
    640,531.08/960,046.20 = 261,215.28/x
  3. Step 3: Cross multiply
    640,531.08x = 960,046.20 × 261,215.28
  4. Step 4: Simplify right side
    640,531.08x = 250,778,736,945.94
  5. Step 5: Solve for x
    x = 250,778,736,945.94/640,531.08
  6. Step 6: Final answer
    x = 391,516.89

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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.