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Finding the Fourth Proportional to 253,290.36, 379,915.82 and 103,490.76

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Solution

The fourth proportional to 253,290.36, 379,915.82 and 103,490.76 is: 155,228.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,290.36 : 379,915.82 = 103,490.76 : x
  2. Step 2: Convert to fraction form
    253,290.36/379,915.82 = 103,490.76/x
  3. Step 3: Cross multiply
    253,290.36x = 379,915.82 × 103,490.76
  4. Step 4: Simplify right side
    253,290.36x = 39,317,776,947.82
  5. Step 5: Solve for x
    x = 39,317,776,947.82/253,290.36
  6. Step 6: Final answer
    x = 155,228.08

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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.