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Finding the Fourth Proportional to 557,243.48, 769,004.94 and 315,519.59

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Solution

The fourth proportional to 557,243.48, 769,004.94 and 315,519.59 is: 435,422.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,243.48 : 769,004.94 = 315,519.59 : x
  2. Step 2: Convert to fraction form
    557,243.48/769,004.94 = 315,519.59/x
  3. Step 3: Cross multiply
    557,243.48x = 769,004.94 × 315,519.59
  4. Step 4: Simplify right side
    557,243.48x = 242,636,119,531.75
  5. Step 5: Solve for x
    x = 242,636,119,531.75/557,243.48
  6. Step 6: Final answer
    x = 435,422.09

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1.5x scale

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.