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Finding the Fourth Proportional to 448,643.21, 672,739.93 and 149,018.74

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Solution

The fourth proportional to 448,643.21, 672,739.93 and 149,018.74 is: 223,453.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,643.21 : 672,739.93 = 149,018.74 : x
  2. Step 2: Convert to fraction form
    448,643.21/672,739.93 = 149,018.74/x
  3. Step 3: Cross multiply
    448,643.21x = 672,739.93 × 149,018.74
  4. Step 4: Simplify right side
    448,643.21x = 100,250,855,220.71
  5. Step 5: Solve for x
    x = 100,250,855,220.71/448,643.21
  6. Step 6: Final answer
    x = 223,453.41

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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.