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Finding the Fourth Proportional to 561,782.13, 775,259.28 and 307,133.25

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Solution

The fourth proportional to 561,782.13, 775,259.28 and 307,133.25 is: 423,843.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,782.13 : 775,259.28 = 307,133.25 : x
  2. Step 2: Convert to fraction form
    561,782.13/775,259.28 = 307,133.25/x
  3. Step 3: Cross multiply
    561,782.13x = 775,259.28 × 307,133.25
  4. Step 4: Simplify right side
    561,782.13x = 238,107,902,259.06
  5. Step 5: Solve for x
    x = 238,107,902,259.06/561,782.13
  6. Step 6: Final answer
    x = 423,843.85

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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.