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Finding the Fourth Proportional to 426,858.66, 640,287.72 and 127,549.22

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Solution

The fourth proportional to 426,858.66, 640,287.72 and 127,549.22 is: 191,323.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,858.66 : 640,287.72 = 127,549.22 : x
  2. Step 2: Convert to fraction form
    426,858.66/640,287.72 = 127,549.22/x
  3. Step 3: Cross multiply
    426,858.66x = 640,287.72 × 127,549.22
  4. Step 4: Simplify right side
    426,858.66x = 81,668,196,060.14
  5. Step 5: Solve for x
    x = 81,668,196,060.14/426,858.66
  6. Step 6: Final answer
    x = 191,323.74

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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.