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Finding the Fourth Proportional to 355,403.88, 532,842.46 and 215,129.32

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Solution

The fourth proportional to 355,403.88, 532,842.46 and 215,129.32 is: 322,534.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,403.88 : 532,842.46 = 215,129.32 : x
  2. Step 2: Convert to fraction form
    355,403.88/532,842.46 = 215,129.32/x
  3. Step 3: Cross multiply
    355,403.88x = 532,842.46 × 215,129.32
  4. Step 4: Simplify right side
    355,403.88x = 114,630,036,086.93
  5. Step 5: Solve for x
    x = 114,630,036,086.93/355,403.88
  6. Step 6: Final answer
    x = 322,534.57

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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.