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Finding the Fourth Proportional to 426,136.02, 638,595 and 312,928.26

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Solution

The fourth proportional to 426,136.02, 638,595 and 312,928.26 is: 468,945.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,136.02 : 638,595 = 312,928.26 : x
  2. Step 2: Convert to fraction form
    426,136.02/638,595 = 312,928.26/x
  3. Step 3: Cross multiply
    426,136.02x = 638,595 × 312,928.26
  4. Step 4: Simplify right side
    426,136.02x = 199,834,422,194.70
  5. Step 5: Solve for x
    x = 199,834,422,194.70/426,136.02
  6. Step 6: Final answer
    x = 468,945.16

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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.