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Finding the Fourth Proportional to 213,617.60, 320,426.40 and 178,884.80

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Solution

The fourth proportional to 213,617.60, 320,426.40 and 178,884.80 is: 268,327.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,617.60 : 320,426.40 = 178,884.80 : x
  2. Step 2: Convert to fraction form
    213,617.60/320,426.40 = 178,884.80/x
  3. Step 3: Cross multiply
    213,617.60x = 320,426.40 × 178,884.80
  4. Step 4: Simplify right side
    213,617.60x = 57,319,412,478.72
  5. Step 5: Solve for x
    x = 57,319,412,478.72/213,617.60
  6. Step 6: Final answer
    x = 268,327.20

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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.