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Finding the Fourth Proportional to 355,628.43, 532,682.55 and 287,867.88

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Solution

The fourth proportional to 355,628.43, 532,682.55 and 287,867.88 is: 431,186.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,628.43 : 532,682.55 = 287,867.88 : x
  2. Step 2: Convert to fraction form
    355,628.43/532,682.55 = 287,867.88/x
  3. Step 3: Cross multiply
    355,628.43x = 532,682.55 × 287,867.88
  4. Step 4: Simplify right side
    355,628.43x = 153,342,196,381.49
  5. Step 5: Solve for x
    x = 153,342,196,381.49/355,628.43
  6. Step 6: Final answer
    x = 431,186.55

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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.