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Finding the Fourth Proportional to 423,943.80, 635,915.70 and 171,345.30

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Solution

The fourth proportional to 423,943.80, 635,915.70 and 171,345.30 is: 257,017.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,943.80 : 635,915.70 = 171,345.30 : x
  2. Step 2: Convert to fraction form
    423,943.80/635,915.70 = 171,345.30/x
  3. Step 3: Cross multiply
    423,943.80x = 635,915.70 × 171,345.30
  4. Step 4: Simplify right side
    423,943.80x = 108,961,166,391.21
  5. Step 5: Solve for x
    x = 108,961,166,391.21/423,943.80
  6. Step 6: Final answer
    x = 257,017.95

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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.