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Finding the Fourth Proportional to 550,799.20, 760,040.40 and 309,031.36

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Solution

The fourth proportional to 550,799.20, 760,040.40 and 309,031.36 is: 426,428.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,799.20 : 760,040.40 = 309,031.36 : x
  2. Step 2: Convert to fraction form
    550,799.20/760,040.40 = 309,031.36/x
  3. Step 3: Cross multiply
    550,799.20x = 760,040.40 × 309,031.36
  4. Step 4: Simplify right side
    550,799.20x = 234,876,318,466.94
  5. Step 5: Solve for x
    x = 234,876,318,466.94/550,799.20
  6. Step 6: Final answer
    x = 426,428.21

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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.