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Finding the Fourth Proportional to 355,597.20, 533,741.40 and 215,629.20

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Solution

The fourth proportional to 355,597.20, 533,741.40 and 215,629.20 is: 323,653.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,597.20 : 533,741.40 = 215,629.20 : x
  2. Step 2: Convert to fraction form
    355,597.20/533,741.40 = 215,629.20/x
  3. Step 3: Cross multiply
    355,597.20x = 533,741.40 × 215,629.20
  4. Step 4: Simplify right side
    355,597.20x = 115,090,231,088.88
  5. Step 5: Solve for x
    x = 115,090,231,088.88/355,597.20
  6. Step 6: Final answer
    x = 323,653.37

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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.