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Finding the Fourth Proportional to 550,915.80, 760,167.81 and 309,208.56

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Solution

The fourth proportional to 550,915.80, 760,167.81 and 309,208.56 is: 426,653.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,915.80 : 760,167.81 = 309,208.56 : x
  2. Step 2: Convert to fraction form
    550,915.80/760,167.81 = 309,208.56/x
  3. Step 3: Cross multiply
    550,915.80x = 760,167.81 × 309,208.56
  4. Step 4: Simplify right side
    550,915.80x = 235,050,393,888.45
  5. Step 5: Solve for x
    x = 235,050,393,888.45/550,915.80
  6. Step 6: Final answer
    x = 426,653.93

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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.