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Finding the Fourth Proportional to 423,726.80, 635,591.21 and 103,880.07

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Solution

The fourth proportional to 423,726.80, 635,591.21 and 103,880.07 is: 155,820.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,726.80 : 635,591.21 = 103,880.07 : x
  2. Step 2: Convert to fraction form
    423,726.80/635,591.21 = 103,880.07/x
  3. Step 3: Cross multiply
    423,726.80x = 635,591.21 × 103,880.07
  4. Step 4: Simplify right side
    423,726.80x = 66,025,258,866.78
  5. Step 5: Solve for x
    x = 66,025,258,866.78/423,726.80
  6. Step 6: Final answer
    x = 155,820.35

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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.