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Finding the Fourth Proportional to 340,929.28, 511,393.48 and 91,611.28

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Solution

The fourth proportional to 340,929.28, 511,393.48 and 91,611.28 is: 137,416.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,929.28 : 511,393.48 = 91,611.28 : x
  2. Step 2: Convert to fraction form
    340,929.28/511,393.48 = 91,611.28/x
  3. Step 3: Cross multiply
    340,929.28x = 511,393.48 × 91,611.28
  4. Step 4: Simplify right side
    340,929.28x = 46,849,411,286.45
  5. Step 5: Solve for x
    x = 46,849,411,286.45/340,929.28
  6. Step 6: Final answer
    x = 137,416.80

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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.