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Finding the Fourth Proportional to 298,666.40, 447,999.60 and 275,856.80

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Solution

The fourth proportional to 298,666.40, 447,999.60 and 275,856.80 is: 413,785.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,666.40 : 447,999.60 = 275,856.80 : x
  2. Step 2: Convert to fraction form
    298,666.40/447,999.60 = 275,856.80/x
  3. Step 3: Cross multiply
    298,666.40x = 447,999.60 × 275,856.80
  4. Step 4: Simplify right side
    298,666.40x = 123,583,736,057.28
  5. Step 5: Solve for x
    x = 123,583,736,057.28/298,666.40
  6. Step 6: Final answer
    x = 413,785.20

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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.