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Finding the Fourth Proportional to 312,097.20, 468,145.80 and 289,978.80

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Solution

The fourth proportional to 312,097.20, 468,145.80 and 289,978.80 is: 434,968.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,097.20 : 468,145.80 = 289,978.80 : x
  2. Step 2: Convert to fraction form
    312,097.20/468,145.80 = 289,978.80/x
  3. Step 3: Cross multiply
    312,097.20x = 468,145.80 × 289,978.80
  4. Step 4: Simplify right side
    312,097.20x = 135,752,357,309.04
  5. Step 5: Solve for x
    x = 135,752,357,309.04/312,097.20
  6. Step 6: Final answer
    x = 434,968.20

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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.