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Finding the Fourth Proportional to 413,960.40, 620,940.60 and 272,242.80

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Solution

The fourth proportional to 413,960.40, 620,940.60 and 272,242.80 is: 408,364.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,960.40 : 620,940.60 = 272,242.80 : x
  2. Step 2: Convert to fraction form
    413,960.40/620,940.60 = 272,242.80/x
  3. Step 3: Cross multiply
    413,960.40x = 620,940.60 × 272,242.80
  4. Step 4: Simplify right side
    413,960.40x = 169,046,607,577.68
  5. Step 5: Solve for x
    x = 169,046,607,577.68/413,960.40
  6. Step 6: Final answer
    x = 408,364.20

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1.5x scale

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.