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Finding the Fourth Proportional to 426,860.66, 640,290.72 and 127,551.22

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Solution

The fourth proportional to 426,860.66, 640,290.72 and 127,551.22 is: 191,326.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,860.66 : 640,290.72 = 127,551.22 : x
  2. Step 2: Convert to fraction form
    426,860.66/640,290.72 = 127,551.22/x
  3. Step 3: Cross multiply
    426,860.66x = 640,290.72 × 127,551.22
  4. Step 4: Simplify right side
    426,860.66x = 81,669,862,490.68
  5. Step 5: Solve for x
    x = 81,669,862,490.68/426,860.66
  6. Step 6: Final answer
    x = 191,326.75

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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.