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Finding the Fourth Proportional to 312,096.70, 468,145.05 and 289,978.30

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Solution

The fourth proportional to 312,096.70, 468,145.05 and 289,978.30 is: 434,967.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,096.70 : 468,145.05 = 289,978.30 : x
  2. Step 2: Convert to fraction form
    312,096.70/468,145.05 = 289,978.30/x
  3. Step 3: Cross multiply
    312,096.70x = 468,145.05 × 289,978.30
  4. Step 4: Simplify right side
    312,096.70x = 135,751,905,752.42
  5. Step 5: Solve for x
    x = 135,751,905,752.42/312,096.70
  6. Step 6: Final answer
    x = 434,967.45

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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.