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Finding the Fourth Proportional to 312,608.40, 468,912.60 and 146,720.40

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Solution

The fourth proportional to 312,608.40, 468,912.60 and 146,720.40 is: 220,080.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,608.40 : 468,912.60 = 146,720.40 : x
  2. Step 2: Convert to fraction form
    312,608.40/468,912.60 = 146,720.40/x
  3. Step 3: Cross multiply
    312,608.40x = 468,912.60 × 146,720.40
  4. Step 4: Simplify right side
    312,608.40x = 68,799,044,237.04
  5. Step 5: Solve for x
    x = 68,799,044,237.04/312,608.40
  6. Step 6: Final answer
    x = 220,080.60

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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.