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Finding the Fourth Proportional to 478,903.56, 660,866.40 and 261,107.52

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Solution

The fourth proportional to 478,903.56, 660,866.40 and 261,107.52 is: 360,317.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,903.56 : 660,866.40 = 261,107.52 : x
  2. Step 2: Convert to fraction form
    478,903.56/660,866.40 = 261,107.52/x
  3. Step 3: Cross multiply
    478,903.56x = 660,866.40 × 261,107.52
  4. Step 4: Simplify right side
    478,903.56x = 172,557,186,755.33
  5. Step 5: Solve for x
    x = 172,557,186,755.33/478,903.56
  6. Step 6: Final answer
    x = 360,317.19

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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.