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Finding the Fourth Proportional to 767,131, 1,150,915.20 and 261,804.40

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Solution

The fourth proportional to 767,131, 1,150,915.20 and 261,804.40 is: 392,781.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    767,131 : 1,150,915.20 = 261,804.40 : x
  2. Step 2: Convert to fraction form
    767,131/1,150,915.20 = 261,804.40/x
  3. Step 3: Cross multiply
    767,131x = 1,150,915.20 × 261,804.40
  4. Step 4: Simplify right side
    767,131x = 301,314,663,386.88
  5. Step 5: Solve for x
    x = 301,314,663,386.88/767,131
  6. Step 6: Final answer
    x = 392,781.24

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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.