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Finding the Fourth Proportional to 412,418.88, 621,437.76 and 339,179.40

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Solution

The fourth proportional to 412,418.88, 621,437.76 and 339,179.40 is: 511,079.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,418.88 : 621,437.76 = 339,179.40 : x
  2. Step 2: Convert to fraction form
    412,418.88/621,437.76 = 339,179.40/x
  3. Step 3: Cross multiply
    412,418.88x = 621,437.76 × 339,179.40
  4. Step 4: Simplify right side
    412,418.88x = 210,778,886,574.14
  5. Step 5: Solve for x
    x = 210,778,886,574.14/412,418.88
  6. Step 6: Final answer
    x = 511,079.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.