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Finding the Fourth Proportional to 665,028.45, 915,806.31 and 577,773.21

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Solution

The fourth proportional to 665,028.45, 915,806.31 and 577,773.21 is: 795,647.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,028.45 : 915,806.31 = 577,773.21 : x
  2. Step 2: Convert to fraction form
    665,028.45/915,806.31 = 577,773.21/x
  3. Step 3: Cross multiply
    665,028.45x = 915,806.31 × 577,773.21
  4. Step 4: Simplify right side
    665,028.45x = 529,128,351,466.96
  5. Step 5: Solve for x
    x = 529,128,351,466.96/665,028.45
  6. Step 6: Final answer
    x = 795,647.69

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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.