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Finding the Fourth Proportional to 306,604.80, 423,114 and 172,468.80

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Solution

The fourth proportional to 306,604.80, 423,114 and 172,468.80 is: 238,006.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,604.80 : 423,114 = 172,468.80 : x
  2. Step 2: Convert to fraction form
    306,604.80/423,114 = 172,468.80/x
  3. Step 3: Cross multiply
    306,604.80x = 423,114 × 172,468.80
  4. Step 4: Simplify right side
    306,604.80x = 72,973,963,843.20
  5. Step 5: Solve for x
    x = 72,973,963,843.20/306,604.80
  6. Step 6: Final answer
    x = 238,006.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.