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Finding the Fourth Proportional to 306,616.50, 423,137.25 and 172,480.50

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Solution

The fourth proportional to 306,616.50, 423,137.25 and 172,480.50 is: 238,026.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,616.50 : 423,137.25 = 172,480.50 : x
  2. Step 2: Convert to fraction form
    306,616.50/423,137.25 = 172,480.50/x
  3. Step 3: Cross multiply
    306,616.50x = 423,137.25 × 172,480.50
  4. Step 4: Simplify right side
    306,616.50x = 72,982,924,448.63
  5. Step 5: Solve for x
    x = 72,982,924,448.63/306,616.50
  6. Step 6: Final answer
    x = 238,026.74

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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.