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Finding the Fourth Proportional to 561,712.19, 775,167.98 and 319,991.18

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Solution

The fourth proportional to 561,712.19, 775,167.98 and 319,991.18 is: 441,590.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,712.19 : 775,167.98 = 319,991.18 : x
  2. Step 2: Convert to fraction form
    561,712.19/775,167.98 = 319,991.18/x
  3. Step 3: Cross multiply
    561,712.19x = 775,167.98 × 319,991.18
  4. Step 4: Simplify right side
    561,712.19x = 248,046,911,142.62
  5. Step 5: Solve for x
    x = 248,046,911,142.62/561,712.19
  6. Step 6: Final answer
    x = 441,590.76

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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.