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Finding the Fourth Proportional to 316,279.10, 436,475.64 and 173,039.21

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Solution

The fourth proportional to 316,279.10, 436,475.64 and 173,039.21 is: 238,799.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,279.10 : 436,475.64 = 173,039.21 : x
  2. Step 2: Convert to fraction form
    316,279.10/436,475.64 = 173,039.21/x
  3. Step 3: Cross multiply
    316,279.10x = 436,475.64 × 173,039.21
  4. Step 4: Simplify right side
    316,279.10x = 75,527,397,747.47
  5. Step 5: Solve for x
    x = 75,527,397,747.47/316,279.10
  6. Step 6: Final answer
    x = 238,799.84

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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.