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Finding the Fourth Proportional to 448,657.80, 672,002.55 and 389,608.80

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Solution

The fourth proportional to 448,657.80, 672,002.55 and 389,608.80 is: 583,558.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,657.80 : 672,002.55 = 389,608.80 : x
  2. Step 2: Convert to fraction form
    448,657.80/672,002.55 = 389,608.80/x
  3. Step 3: Cross multiply
    448,657.80x = 672,002.55 × 389,608.80
  4. Step 4: Simplify right side
    448,657.80x = 261,818,107,102.44
  5. Step 5: Solve for x
    x = 261,818,107,102.44/448,657.80
  6. Step 6: Final answer
    x = 583,558.58

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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.