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Finding the Fourth Proportional to 449,603.80, 672,421.74 and 400,031.80

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Solution

The fourth proportional to 449,603.80, 672,421.74 and 400,031.80 is: 598,282.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,603.80 : 672,421.74 = 400,031.80 : x
  2. Step 2: Convert to fraction form
    449,603.80/672,421.74 = 400,031.80/x
  3. Step 3: Cross multiply
    449,603.80x = 672,421.74 × 400,031.80
  4. Step 4: Simplify right side
    449,603.80x = 268,990,079,011.33
  5. Step 5: Solve for x
    x = 268,990,079,011.33/449,603.80
  6. Step 6: Final answer
    x = 598,282.49

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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.