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Finding the Fourth Proportional to 448,099.80, 672,149.70 and 315,130.20

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Solution

The fourth proportional to 448,099.80, 672,149.70 and 315,130.20 is: 472,695.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,099.80 : 672,149.70 = 315,130.20 : x
  2. Step 2: Convert to fraction form
    448,099.80/672,149.70 = 315,130.20/x
  3. Step 3: Cross multiply
    448,099.80x = 672,149.70 × 315,130.20
  4. Step 4: Simplify right side
    448,099.80x = 211,814,669,390.94
  5. Step 5: Solve for x
    x = 211,814,669,390.94/448,099.80
  6. Step 6: Final answer
    x = 472,695.30

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Similar ratio
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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.