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Finding the Fourth Proportional to 312,446.75, 468,750.05 and 90,830.75

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Solution

The fourth proportional to 312,446.75, 468,750.05 and 90,830.75 is: 136,269.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,446.75 : 468,750.05 = 90,830.75 : x
  2. Step 2: Convert to fraction form
    312,446.75/468,750.05 = 90,830.75/x
  3. Step 3: Cross multiply
    312,446.75x = 468,750.05 × 90,830.75
  4. Step 4: Simplify right side
    312,446.75x = 42,576,918,604.04
  5. Step 5: Solve for x
    x = 42,576,918,604.04/312,446.75
  6. Step 6: Final answer
    x = 136,269.36

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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.