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Finding the Fourth Proportional to 312,078.60, 468,117.90 and 308,968.20

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Solution

The fourth proportional to 312,078.60, 468,117.90 and 308,968.20 is: 463,452.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,078.60 : 468,117.90 = 308,968.20 : x
  2. Step 2: Convert to fraction form
    312,078.60/468,117.90 = 308,968.20/x
  3. Step 3: Cross multiply
    312,078.60x = 468,117.90 × 308,968.20
  4. Step 4: Simplify right side
    312,078.60x = 144,633,544,950.78
  5. Step 5: Solve for x
    x = 144,633,544,950.78/312,078.60
  6. Step 6: Final answer
    x = 463,452.30

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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.