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Finding the Fourth Proportional to 340,921.47, 511,381.92 and 91,603.47

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Solution

The fourth proportional to 340,921.47, 511,381.92 and 91,603.47 is: 137,405.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,921.47 : 511,381.92 = 91,603.47 : x
  2. Step 2: Convert to fraction form
    340,921.47/511,381.92 = 91,603.47/x
  3. Step 3: Cross multiply
    340,921.47x = 511,381.92 × 91,603.47
  4. Step 4: Simplify right side
    340,921.47x = 46,844,358,367.26
  5. Step 5: Solve for x
    x = 46,844,358,367.26/340,921.47
  6. Step 6: Final answer
    x = 137,405.13

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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.