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Finding the Fourth Proportional to 340,783.45, 511,175.10 and 91,465.45

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Solution

The fourth proportional to 340,783.45, 511,175.10 and 91,465.45 is: 137,198.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,783.45 : 511,175.10 = 91,465.45 : x
  2. Step 2: Convert to fraction form
    340,783.45/511,175.10 = 91,465.45/x
  3. Step 3: Cross multiply
    340,783.45x = 511,175.10 × 91,465.45
  4. Step 4: Simplify right side
    340,783.45x = 46,754,859,615.35
  5. Step 5: Solve for x
    x = 46,754,859,615.35/340,783.45
  6. Step 6: Final answer
    x = 137,198.15

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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.