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Finding the Fourth Proportional to 319,424.40, 479,136.60 and 263,437.20

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Solution

The fourth proportional to 319,424.40, 479,136.60 and 263,437.20 is: 395,155.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,424.40 : 479,136.60 = 263,437.20 : x
  2. Step 2: Convert to fraction form
    319,424.40/479,136.60 = 263,437.20/x
  3. Step 3: Cross multiply
    319,424.40x = 479,136.60 × 263,437.20
  4. Step 4: Simplify right side
    319,424.40x = 126,222,404,321.52
  5. Step 5: Solve for x
    x = 126,222,404,321.52/319,424.40
  6. Step 6: Final answer
    x = 395,155.80

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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.