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Finding the Fourth Proportional to 638,448.75, 955,307.55 and 511,704.58

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Solution

The fourth proportional to 638,448.75, 955,307.55 and 511,704.58 is: 765,660.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,448.75 : 955,307.55 = 511,704.58 : x
  2. Step 2: Convert to fraction form
    638,448.75/955,307.55 = 511,704.58/x
  3. Step 3: Cross multiply
    638,448.75x = 955,307.55 × 511,704.58
  4. Step 4: Simplify right side
    638,448.75x = 488,835,248,643.58
  5. Step 5: Solve for x
    x = 488,835,248,643.58/638,448.75
  6. Step 6: Final answer
    x = 765,660.91

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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.