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Finding the Fourth Proportional to 485,801.96, 670,736.93 and 314,135.21

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Solution

The fourth proportional to 485,801.96, 670,736.93 and 314,135.21 is: 433,720.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,801.96 : 670,736.93 = 314,135.21 : x
  2. Step 2: Convert to fraction form
    485,801.96/670,736.93 = 314,135.21/x
  3. Step 3: Cross multiply
    485,801.96x = 670,736.93 × 314,135.21
  4. Step 4: Simplify right side
    485,801.96x = 210,702,086,466.47
  5. Step 5: Solve for x
    x = 210,702,086,466.47/485,801.96
  6. Step 6: Final answer
    x = 433,720.13

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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.