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Finding the Fourth Proportional to 426,751.16, 640,159.41 and 127,208.84

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Solution

The fourth proportional to 426,751.16, 640,159.41 and 127,208.84 is: 190,823.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,751.16 : 640,159.41 = 127,208.84 : x
  2. Step 2: Convert to fraction form
    426,751.16/640,159.41 = 127,208.84/x
  3. Step 3: Cross multiply
    426,751.16x = 640,159.41 × 127,208.84
  4. Step 4: Simplify right side
    426,751.16x = 81,433,935,961.18
  5. Step 5: Solve for x
    x = 81,433,935,961.18/426,751.16
  6. Step 6: Final answer
    x = 190,823.00

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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.