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Finding the Fourth Proportional to 354,409.39, 529,354.97 and 320,623.57

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Solution

The fourth proportional to 354,409.39, 529,354.97 and 320,623.57 is: 478,891.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,409.39 : 529,354.97 = 320,623.57 : x
  2. Step 2: Convert to fraction form
    354,409.39/529,354.97 = 320,623.57/x
  3. Step 3: Cross multiply
    354,409.39x = 529,354.97 × 320,623.57
  4. Step 4: Simplify right side
    354,409.39x = 169,723,680,278.64
  5. Step 5: Solve for x
    x = 169,723,680,278.64/354,409.39
  6. Step 6: Final answer
    x = 478,891.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.