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Finding the Fourth Proportional to 320,005.20, 480,007.80 and 231,877.20

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Solution

The fourth proportional to 320,005.20, 480,007.80 and 231,877.20 is: 347,815.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,005.20 : 480,007.80 = 231,877.20 : x
  2. Step 2: Convert to fraction form
    320,005.20/480,007.80 = 231,877.20/x
  3. Step 3: Cross multiply
    320,005.20x = 480,007.80 × 231,877.20
  4. Step 4: Simplify right side
    320,005.20x = 111,302,864,642.16
  5. Step 5: Solve for x
    x = 111,302,864,642.16/320,005.20
  6. Step 6: Final answer
    x = 347,815.80

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1.5x scale

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.