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Finding the Fourth Proportional to 384,939.40, 576,717.90 and 329,643.40

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Solution

The fourth proportional to 384,939.40, 576,717.90 and 329,643.40 is: 493,873.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,939.40 : 576,717.90 = 329,643.40 : x
  2. Step 2: Convert to fraction form
    384,939.40/576,717.90 = 329,643.40/x
  3. Step 3: Cross multiply
    384,939.40x = 576,717.90 × 329,643.40
  4. Step 4: Simplify right side
    384,939.40x = 190,111,249,396.86
  5. Step 5: Solve for x
    x = 190,111,249,396.86/384,939.40
  6. Step 6: Final answer
    x = 493,873.19

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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.