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Finding the Fourth Proportional to 561,420.22, 775,579.50 and 485,837.50

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Solution

The fourth proportional to 561,420.22, 775,579.50 and 485,837.50 is: 671,165.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,420.22 : 775,579.50 = 485,837.50 : x
  2. Step 2: Convert to fraction form
    561,420.22/775,579.50 = 485,837.50/x
  3. Step 3: Cross multiply
    561,420.22x = 775,579.50 × 485,837.50
  4. Step 4: Simplify right side
    561,420.22x = 376,805,605,331.25
  5. Step 5: Solve for x
    x = 376,805,605,331.25/561,420.22
  6. Step 6: Final answer
    x = 671,165.01

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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.