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Finding the Fourth Proportional to 446,612.40, 669,918.60 and 147,139.20

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Solution

The fourth proportional to 446,612.40, 669,918.60 and 147,139.20 is: 220,708.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    446,612.40 : 669,918.60 = 147,139.20 : x
  2. Step 2: Convert to fraction form
    446,612.40/669,918.60 = 147,139.20/x
  3. Step 3: Cross multiply
    446,612.40x = 669,918.60 × 147,139.20
  4. Step 4: Simplify right side
    446,612.40x = 98,571,286,869.12
  5. Step 5: Solve for x
    x = 98,571,286,869.12/446,612.40
  6. Step 6: Final answer
    x = 220,708.80

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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.