Home / 448,121.20-672,181.80-399,132.40

Finding the Fourth Proportional to 448,121.20, 672,181.80 and 399,132.40

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Solution

The fourth proportional to 448,121.20, 672,181.80 and 399,132.40 is: 598,698.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,121.20 : 672,181.80 = 399,132.40 : x
  2. Step 2: Convert to fraction form
    448,121.20/672,181.80 = 399,132.40/x
  3. Step 3: Cross multiply
    448,121.20x = 672,181.80 × 399,132.40
  4. Step 4: Simplify right side
    448,121.20x = 268,289,535,070.32
  5. Step 5: Solve for x
    x = 268,289,535,070.32/448,121.20
  6. Step 6: Final answer
    x = 598,698.60

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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.