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Finding the Fourth Proportional to 320,637.92, 480,956.42 and 128,598.98

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Solution

The fourth proportional to 320,637.92, 480,956.42 and 128,598.98 is: 192,898.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,637.92 : 480,956.42 = 128,598.98 : x
  2. Step 2: Convert to fraction form
    320,637.92/480,956.42 = 128,598.98/x
  3. Step 3: Cross multiply
    320,637.92x = 480,956.42 × 128,598.98
  4. Step 4: Simplify right side
    320,637.92x = 61,850,505,036.45
  5. Step 5: Solve for x
    x = 61,850,505,036.45/320,637.92
  6. Step 6: Final answer
    x = 192,898.29

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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.