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Finding the Fourth Proportional to 308,178.98, 425,278.80 and 172,214.04

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Solution

The fourth proportional to 308,178.98, 425,278.80 and 172,214.04 is: 237,650.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,178.98 : 425,278.80 = 172,214.04 : x
  2. Step 2: Convert to fraction form
    308,178.98/425,278.80 = 172,214.04/x
  3. Step 3: Cross multiply
    308,178.98x = 425,278.80 × 172,214.04
  4. Step 4: Simplify right side
    308,178.98x = 73,238,980,274.35
  5. Step 5: Solve for x
    x = 73,238,980,274.35/308,178.98
  6. Step 6: Final answer
    x = 237,650.80

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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.