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Finding the Fourth Proportional to 557,609.84, 769,476.49 and 315,887.48

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Solution

The fourth proportional to 557,609.84, 769,476.49 and 315,887.48 is: 435,910.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,609.84 : 769,476.49 = 315,887.48 : x
  2. Step 2: Convert to fraction form
    557,609.84/769,476.49 = 315,887.48/x
  3. Step 3: Cross multiply
    557,609.84x = 769,476.49 × 315,887.48
  4. Step 4: Simplify right side
    557,609.84x = 243,067,985,497.96
  5. Step 5: Solve for x
    x = 243,067,985,497.96/557,609.84
  6. Step 6: Final answer
    x = 435,910.51

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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.