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Finding the Fourth Proportional to 407,479.80, 611,277.93 and 127,018.92

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Solution

The fourth proportional to 407,479.80, 611,277.93 and 127,018.92 is: 190,546.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,479.80 : 611,277.93 = 127,018.92 : x
  2. Step 2: Convert to fraction form
    407,479.80/611,277.93 = 127,018.92/x
  3. Step 3: Cross multiply
    407,479.80x = 611,277.93 × 127,018.92
  4. Step 4: Simplify right side
    407,479.80x = 77,643,862,488.44
  5. Step 5: Solve for x
    x = 77,643,862,488.44/407,479.80
  6. Step 6: Final answer
    x = 190,546.53

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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.