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Finding the Fourth Proportional to 383,886.99, 529,933.94 and 247,987.21

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Solution

The fourth proportional to 383,886.99, 529,933.94 and 247,987.21 is: 342,332.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,886.99 : 529,933.94 = 247,987.21 : x
  2. Step 2: Convert to fraction form
    383,886.99/529,933.94 = 247,987.21/x
  3. Step 3: Cross multiply
    383,886.99x = 529,933.94 × 247,987.21
  4. Step 4: Simplify right side
    383,886.99x = 131,416,839,264.91
  5. Step 5: Solve for x
    x = 131,416,839,264.91/383,886.99
  6. Step 6: Final answer
    x = 342,332.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.