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Finding the Fourth Proportional to 557,858.03, 769,860.31 and 316,132.56

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Solution

The fourth proportional to 557,858.03, 769,860.31 and 316,132.56 is: 436,272.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,858.03 : 769,860.31 = 316,132.56 : x
  2. Step 2: Convert to fraction form
    557,858.03/769,860.31 = 316,132.56/x
  3. Step 3: Cross multiply
    557,858.03x = 769,860.31 × 316,132.56
  4. Step 4: Simplify right side
    557,858.03x = 243,377,910,642.69
  5. Step 5: Solve for x
    x = 243,377,910,642.69/557,858.03
  6. Step 6: Final answer
    x = 436,272.13

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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.