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Finding the Fourth Proportional to 551,835.33, 761,600.39 and 310,128.09

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Solution

The fourth proportional to 551,835.33, 761,600.39 and 310,128.09 is: 428,014.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,835.33 : 761,600.39 = 310,128.09 : x
  2. Step 2: Convert to fraction form
    551,835.33/761,600.39 = 310,128.09/x
  3. Step 3: Cross multiply
    551,835.33x = 761,600.39 × 310,128.09
  4. Step 4: Simplify right side
    551,835.33x = 236,193,672,743.32
  5. Step 5: Solve for x
    x = 236,193,672,743.32/551,835.33
  6. Step 6: Final answer
    x = 428,014.77

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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.