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Finding the Fourth Proportional to 638,007.48, 879,239.52 and 456,404.49

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Solution

The fourth proportional to 638,007.48, 879,239.52 and 456,404.49 is: 628,972.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,007.48 : 879,239.52 = 456,404.49 : x
  2. Step 2: Convert to fraction form
    638,007.48/879,239.52 = 456,404.49/x
  3. Step 3: Cross multiply
    638,007.48x = 879,239.52 × 456,404.49
  4. Step 4: Simplify right side
    638,007.48x = 401,288,864,713.45
  5. Step 5: Solve for x
    x = 401,288,864,713.45/638,007.48
  6. Step 6: Final answer
    x = 628,972.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.