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Finding the Fourth Proportional to 448,129.60, 672,194.40 and 445,019.20

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Solution

The fourth proportional to 448,129.60, 672,194.40 and 445,019.20 is: 667,528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,129.60 : 672,194.40 = 445,019.20 : x
  2. Step 2: Convert to fraction form
    448,129.60/672,194.40 = 445,019.20/x
  3. Step 3: Cross multiply
    448,129.60x = 672,194.40 × 445,019.20
  4. Step 4: Simplify right side
    448,129.60x = 299,139,414,132.48
  5. Step 5: Solve for x
    x = 299,139,414,132.48/448,129.60
  6. Step 6: Final answer
    x = 667,528.80

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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.