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Finding the Fourth Proportional to 551,308.74, 760,782.48 and 321,878.74

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Solution

The fourth proportional to 551,308.74, 760,782.48 and 321,878.74 is: 444,178.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,308.74 : 760,782.48 = 321,878.74 : x
  2. Step 2: Convert to fraction form
    551,308.74/760,782.48 = 321,878.74/x
  3. Step 3: Cross multiply
    551,308.74x = 760,782.48 × 321,878.74
  4. Step 4: Simplify right side
    551,308.74x = 244,879,706,076.48
  5. Step 5: Solve for x
    x = 244,879,706,076.48/551,308.74
  6. Step 6: Final answer
    x = 444,178.89

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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.