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Finding the Fourth Proportional to 368,136.20, 551,426.70 and 305,928.20

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Solution

The fourth proportional to 368,136.20, 551,426.70 and 305,928.20 is: 458,246.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,136.20 : 551,426.70 = 305,928.20 : x
  2. Step 2: Convert to fraction form
    368,136.20/551,426.70 = 305,928.20/x
  3. Step 3: Cross multiply
    368,136.20x = 551,426.70 × 305,928.20
  4. Step 4: Simplify right side
    368,136.20x = 168,696,977,762.94
  5. Step 5: Solve for x
    x = 168,696,977,762.94/368,136.20
  6. Step 6: Final answer
    x = 458,246.10

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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.