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Finding the Fourth Proportional to 316,650.64, 436,979.28 and 173,411.68

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Solution

The fourth proportional to 316,650.64, 436,979.28 and 173,411.68 is: 239,308.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,650.64 : 436,979.28 = 173,411.68 : x
  2. Step 2: Convert to fraction form
    316,650.64/436,979.28 = 173,411.68/x
  3. Step 3: Cross multiply
    316,650.64x = 436,979.28 × 173,411.68
  4. Step 4: Simplify right side
    316,650.64x = 75,777,311,069.99
  5. Step 5: Solve for x
    x = 75,777,311,069.99/316,650.64
  6. Step 6: Final answer
    x = 239,308.88

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1.5x scale

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.