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Finding the Fourth Proportional to 354,239.69, 529,101.90 and 320,453.73

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Solution

The fourth proportional to 354,239.69, 529,101.90 and 320,453.73 is: 478,638.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,239.69 : 529,101.90 = 320,453.73 : x
  2. Step 2: Convert to fraction form
    354,239.69/529,101.90 = 320,453.73/x
  3. Step 3: Cross multiply
    354,239.69x = 529,101.90 × 320,453.73
  4. Step 4: Simplify right side
    354,239.69x = 169,552,677,405.09
  5. Step 5: Solve for x
    x = 169,552,677,405.09/354,239.69
  6. Step 6: Final answer
    x = 478,638.29

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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.