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Finding the Fourth Proportional to 455,216.40, 682,824.60 and 218,437.20

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Solution

The fourth proportional to 455,216.40, 682,824.60 and 218,437.20 is: 327,655.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,216.40 : 682,824.60 = 218,437.20 : x
  2. Step 2: Convert to fraction form
    455,216.40/682,824.60 = 218,437.20/x
  3. Step 3: Cross multiply
    455,216.40x = 682,824.60 × 218,437.20
  4. Step 4: Simplify right side
    455,216.40x = 149,154,293,715.12
  5. Step 5: Solve for x
    x = 149,154,293,715.12/455,216.40
  6. Step 6: Final answer
    x = 327,655.80

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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.