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Finding the Fourth Proportional to 340,610.40, 510,915.60 and 91,292.40

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Solution

The fourth proportional to 340,610.40, 510,915.60 and 91,292.40 is: 136,938.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,610.40 : 510,915.60 = 91,292.40 : x
  2. Step 2: Convert to fraction form
    340,610.40/510,915.60 = 91,292.40/x
  3. Step 3: Cross multiply
    340,610.40x = 510,915.60 × 91,292.40
  4. Step 4: Simplify right side
    340,610.40x = 46,642,711,321.44
  5. Step 5: Solve for x
    x = 46,642,711,321.44/340,610.40
  6. Step 6: Final answer
    x = 136,938.60

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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.