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Finding the Fourth Proportional to 341,309.50, 511,964.25 and 91,991.50

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Solution

The fourth proportional to 341,309.50, 511,964.25 and 91,991.50 is: 137,987.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,309.50 : 511,964.25 = 91,991.50 : x
  2. Step 2: Convert to fraction form
    341,309.50/511,964.25 = 91,991.50/x
  3. Step 3: Cross multiply
    341,309.50x = 511,964.25 × 91,991.50
  4. Step 4: Simplify right side
    341,309.50x = 47,096,359,303.88
  5. Step 5: Solve for x
    x = 47,096,359,303.88/341,309.50
  6. Step 6: Final answer
    x = 137,987.25

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1.5x scale

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.